LCOV - code coverage report
Current view: top level - gcc - lra-constraints.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 87.2 % 3761 3280
Test Date: 2025-03-22 13:13:03 Functions: 91.5 % 106 97
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             Branch data     Line data    Source code
       1                 :             : /* Code for RTL transformations to satisfy insn constraints.
       2                 :             :    Copyright (C) 2010-2025 Free Software Foundation, Inc.
       3                 :             :    Contributed by Vladimir Makarov <vmakarov@redhat.com>.
       4                 :             : 
       5                 :             :    This file is part of GCC.
       6                 :             : 
       7                 :             :    GCC is free software; you can redistribute it and/or modify it under
       8                 :             :    the terms of the GNU General Public License as published by the Free
       9                 :             :    Software Foundation; either version 3, or (at your option) any later
      10                 :             :    version.
      11                 :             : 
      12                 :             :    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13                 :             :    WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14                 :             :    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15                 :             :    for more details.
      16                 :             : 
      17                 :             :    You should have received a copy of the GNU General Public License
      18                 :             :    along with GCC; see the file COPYING3.  If not see
      19                 :             :    <http://www.gnu.org/licenses/>.  */
      20                 :             : 
      21                 :             : 
      22                 :             : /* This file contains code for 3 passes: constraint pass,
      23                 :             :    inheritance/split pass, and pass for undoing failed inheritance and
      24                 :             :    split.
      25                 :             : 
      26                 :             :    The major goal of constraint pass is to transform RTL to satisfy
      27                 :             :    insn and address constraints by:
      28                 :             :      o choosing insn alternatives;
      29                 :             :      o generating *reload insns* (or reloads in brief) and *reload
      30                 :             :        pseudos* which will get necessary hard registers later;
      31                 :             :      o substituting pseudos with equivalent values and removing the
      32                 :             :        instructions that initialized those pseudos.
      33                 :             : 
      34                 :             :    The constraint pass has biggest and most complicated code in LRA.
      35                 :             :    There are a lot of important details like:
      36                 :             :      o reuse of input reload pseudos to simplify reload pseudo
      37                 :             :        allocations;
      38                 :             :      o some heuristics to choose insn alternative to improve the
      39                 :             :        inheritance;
      40                 :             :      o early clobbers etc.
      41                 :             : 
      42                 :             :    The pass is mimicking former reload pass in alternative choosing
      43                 :             :    because the reload pass is oriented to current machine description
      44                 :             :    model.  It might be changed if the machine description model is
      45                 :             :    changed.
      46                 :             : 
      47                 :             :    There is special code for preventing all LRA and this pass cycling
      48                 :             :    in case of bugs.
      49                 :             : 
      50                 :             :    On the first iteration of the pass we process every instruction and
      51                 :             :    choose an alternative for each one.  On subsequent iterations we try
      52                 :             :    to avoid reprocessing instructions if we can be sure that the old
      53                 :             :    choice is still valid.
      54                 :             : 
      55                 :             :    The inheritance/spilt pass is to transform code to achieve
      56                 :             :    ineheritance and live range splitting.  It is done on backward
      57                 :             :    traversal of EBBs.
      58                 :             : 
      59                 :             :    The inheritance optimization goal is to reuse values in hard
      60                 :             :    registers. There is analogous optimization in old reload pass.  The
      61                 :             :    inheritance is achieved by following transformation:
      62                 :             : 
      63                 :             :        reload_p1 <- p             reload_p1 <- p
      64                 :             :        ...                   new_p <- reload_p1
      65                 :             :        ...              =>   ...
      66                 :             :        reload_p2 <- p             reload_p2 <- new_p
      67                 :             : 
      68                 :             :    where p is spilled and not changed between the insns.  Reload_p1 is
      69                 :             :    also called *original pseudo* and new_p is called *inheritance
      70                 :             :    pseudo*.
      71                 :             : 
      72                 :             :    The subsequent assignment pass will try to assign the same (or
      73                 :             :    another if it is not possible) hard register to new_p as to
      74                 :             :    reload_p1 or reload_p2.
      75                 :             : 
      76                 :             :    If the assignment pass fails to assign a hard register to new_p,
      77                 :             :    this file will undo the inheritance and restore the original code.
      78                 :             :    This is because implementing the above sequence with a spilled
      79                 :             :    new_p would make the code much worse.  The inheritance is done in
      80                 :             :    EBB scope.  The above is just a simplified example to get an idea
      81                 :             :    of the inheritance as the inheritance is also done for non-reload
      82                 :             :    insns.
      83                 :             : 
      84                 :             :    Splitting (transformation) is also done in EBB scope on the same
      85                 :             :    pass as the inheritance:
      86                 :             : 
      87                 :             :        r <- ... or ... <- r                r <- ... or ... <- r
      88                 :             :        ...                               s <- r (new insn -- save)
      89                 :             :        ...                        =>
      90                 :             :        ...                               r <- s (new insn -- restore)
      91                 :             :        ... <- r                               ... <- r
      92                 :             : 
      93                 :             :     The *split pseudo* s is assigned to the hard register of the
      94                 :             :     original pseudo or hard register r.
      95                 :             : 
      96                 :             :     Splitting is done:
      97                 :             :       o In EBBs with high register pressure for global pseudos (living
      98                 :             :         in at least 2 BBs) and assigned to hard registers when there
      99                 :             :         are more one reloads needing the hard registers;
     100                 :             :       o for pseudos needing save/restore code around calls.
     101                 :             : 
     102                 :             :     If the split pseudo still has the same hard register as the
     103                 :             :     original pseudo after the subsequent assignment pass or the
     104                 :             :     original pseudo was split, the opposite transformation is done on
     105                 :             :     the same pass for undoing inheritance.  */
     106                 :             : 
     107                 :             : #undef REG_OK_STRICT
     108                 :             : 
     109                 :             : #include "config.h"
     110                 :             : #include "system.h"
     111                 :             : #include "coretypes.h"
     112                 :             : #include "backend.h"
     113                 :             : #include "hooks.h"
     114                 :             : #include "target.h"
     115                 :             : #include "rtl.h"
     116                 :             : #include "tree.h"
     117                 :             : #include "predict.h"
     118                 :             : #include "df.h"
     119                 :             : #include "memmodel.h"
     120                 :             : #include "tm_p.h"
     121                 :             : #include "expmed.h"
     122                 :             : #include "optabs.h"
     123                 :             : #include "regs.h"
     124                 :             : #include "ira.h"
     125                 :             : #include "recog.h"
     126                 :             : #include "output.h"
     127                 :             : #include "addresses.h"
     128                 :             : #include "expr.h"
     129                 :             : #include "cfgrtl.h"
     130                 :             : #include "rtl-error.h"
     131                 :             : #include "lra.h"
     132                 :             : #include "lra-int.h"
     133                 :             : #include "print-rtl.h"
     134                 :             : #include "function-abi.h"
     135                 :             : #include "rtl-iter.h"
     136                 :             : 
     137                 :             : /* Value of LRA_CURR_RELOAD_NUM at the beginning of BB of the current
     138                 :             :    insn.  Remember that LRA_CURR_RELOAD_NUM is the number of emitted
     139                 :             :    reload insns.  */
     140                 :             : static int bb_reload_num;
     141                 :             : 
     142                 :             : /* The current insn being processed and corresponding its single set
     143                 :             :    (NULL otherwise), its data (basic block, the insn data, the insn
     144                 :             :    static data, and the mode of each operand).  */
     145                 :             : static rtx_insn *curr_insn;
     146                 :             : static rtx curr_insn_set;
     147                 :             : static basic_block curr_bb;
     148                 :             : static lra_insn_recog_data_t curr_id;
     149                 :             : static struct lra_static_insn_data *curr_static_id;
     150                 :             : static machine_mode curr_operand_mode[MAX_RECOG_OPERANDS];
     151                 :             : /* Mode of the register substituted by its equivalence with VOIDmode
     152                 :             :    (e.g. constant) and whose subreg is given operand of the current
     153                 :             :    insn.  VOIDmode in all other cases.  */
     154                 :             : static machine_mode original_subreg_reg_mode[MAX_RECOG_OPERANDS];
     155                 :             : /* The first call insn after curr_insn within the EBB during inherit_in_ebb
     156                 :             :    or NULL outside of that function.  */
     157                 :             : static rtx_insn *first_call_insn;
     158                 :             : 
     159                 :             : 
     160                 :             : 
     161                 :             : /* Start numbers for new registers and insns at the current constraints
     162                 :             :    pass start.  */
     163                 :             : static int new_regno_start;
     164                 :             : static int new_insn_uid_start;
     165                 :             : 
     166                 :             : /* If LOC is nonnull, strip any outer subreg from it.  */
     167                 :             : static inline rtx *
     168                 :   216968054 : strip_subreg (rtx *loc)
     169                 :             : {
     170                 :    95150678 :   return loc && GET_CODE (*loc) == SUBREG ? &SUBREG_REG (*loc) : loc;
     171                 :             : }
     172                 :             : 
     173                 :             : /* Return hard regno of REGNO or if it is was not assigned to a hard
     174                 :             :    register, use a hard register from its allocno class.  */
     175                 :             : static int
     176                 :       92792 : get_try_hard_regno (int regno)
     177                 :             : {
     178                 :       92792 :   int hard_regno;
     179                 :       92792 :   enum reg_class rclass;
     180                 :             : 
     181                 :       92792 :   if ((hard_regno = regno) >= FIRST_PSEUDO_REGISTER)
     182                 :       92792 :     hard_regno = lra_get_regno_hard_regno (regno);
     183                 :       92792 :   if (hard_regno >= 0)
     184                 :             :     return hard_regno;
     185                 :       38849 :   rclass = lra_get_allocno_class (regno);
     186                 :       38849 :   if (rclass == NO_REGS)
     187                 :             :     return -1;
     188                 :       35872 :   return ira_class_hard_regs[rclass][0];
     189                 :             : }
     190                 :             : 
     191                 :             : /* Return the hard regno of X after removing its subreg.  If X is not a
     192                 :             :    register or a subreg of a register, return -1.  If X is a pseudo, use its
     193                 :             :    assignment.  If X is a hard regno, return the final hard regno which will be
     194                 :             :    after elimination.  */
     195                 :             : static int
     196                 :   278422613 : get_hard_regno (rtx x)
     197                 :             : {
     198                 :   278422613 :   rtx reg;
     199                 :   278422613 :   int hard_regno;
     200                 :             : 
     201                 :   278422613 :   reg = x;
     202                 :   278422613 :   if (SUBREG_P (x))
     203                 :     5287005 :     reg = SUBREG_REG (x);
     204                 :   278422613 :   if (! REG_P (reg))
     205                 :             :     return -1;
     206                 :   192710429 :   int regno = REGNO (reg);
     207                 :   192710429 :   if (HARD_REGISTER_NUM_P (regno))
     208                 :    34490433 :     hard_regno = lra_get_elimination_hard_regno (regno);
     209                 :             :   else
     210                 :   158219996 :     hard_regno = lra_get_regno_hard_regno (regno);
     211                 :   192710429 :   if (hard_regno < 0)
     212                 :             :     return -1;
     213                 :   175545219 :   if (SUBREG_P (x))
     214                 :     4598758 :     hard_regno += subreg_regno_offset (hard_regno, GET_MODE (reg),
     215                 :     4598758 :                                        SUBREG_BYTE (x),  GET_MODE (x));
     216                 :             :   return hard_regno;
     217                 :             : }
     218                 :             : 
     219                 :             : /* If REGNO is a hard register or has been allocated a hard register,
     220                 :             :    return the class of that register.  If REGNO is a reload pseudo
     221                 :             :    created by the current constraints pass, return its allocno class.
     222                 :             :    Return NO_REGS otherwise.  */
     223                 :             : static enum reg_class
     224                 :   494829326 : get_reg_class (int regno)
     225                 :             : {
     226                 :   494829326 :   int hard_regno;
     227                 :             : 
     228                 :   494829326 :   if (HARD_REGISTER_NUM_P (regno))
     229                 :    62954454 :     hard_regno = lra_get_elimination_hard_regno (regno);
     230                 :             :   else
     231                 :   431874872 :     hard_regno = lra_get_regno_hard_regno (regno);
     232                 :   494829326 :   if (hard_regno >= 0)
     233                 :   308923483 :     return REGNO_REG_CLASS (hard_regno);
     234                 :   185905843 :   if (regno >= new_regno_start)
     235                 :    61379135 :     return lra_get_allocno_class (regno);
     236                 :             :   return NO_REGS;
     237                 :             : }
     238                 :             : 
     239                 :             : /* Return true if REG_CLASS has enough allocatable hard regs to keep value of
     240                 :             :    REG_MODE.  */
     241                 :             : static bool
     242                 :    18289773 : enough_allocatable_hard_regs_p (enum reg_class reg_class,
     243                 :             :                                 enum machine_mode reg_mode)
     244                 :             : {
     245                 :    18289773 :   int i, j, hard_regno, class_size, nregs;
     246                 :             : 
     247                 :    36579546 :   if (hard_reg_set_subset_p (reg_class_contents[reg_class], lra_no_alloc_regs))
     248                 :             :     return false;
     249                 :     6068825 :   class_size = ira_class_hard_regs_num[reg_class];
     250                 :     6068825 :   for (i = 0; i < class_size; i++)
     251                 :             :     {
     252                 :     6068825 :       hard_regno = ira_class_hard_regs[reg_class][i];
     253                 :     6068825 :       nregs = hard_regno_nregs (hard_regno, reg_mode);
     254                 :     6068825 :       if (nregs == 1)
     255                 :             :         return true;
     256                 :      232107 :       for (j = 0; j < nregs; j++)
     257                 :      154738 :         if (TEST_HARD_REG_BIT (lra_no_alloc_regs, hard_regno + j)
     258                 :      154738 :             || ! TEST_HARD_REG_BIT (reg_class_contents[reg_class],
     259                 :             :                                     hard_regno + j))
     260                 :             :           break;
     261                 :       77369 :       if (j >= nregs)
     262                 :             :         return true;
     263                 :             :     }
     264                 :             :   return false;
     265                 :             : }
     266                 :             : 
     267                 :             : /* True if C is a non-empty register class that has too few registers
     268                 :             :    to be safely used as a reload target class.  */
     269                 :             : #define SMALL_REGISTER_CLASS_P(C)               \
     270                 :             :   (ira_class_hard_regs_num [(C)] == 1           \
     271                 :             :    || (ira_class_hard_regs_num [(C)] >= 1    \
     272                 :             :        && targetm.class_likely_spilled_p (C)))
     273                 :             : 
     274                 :             : /* Return true if REG satisfies (or will satisfy) reg class constraint
     275                 :             :    CL.  Use elimination first if REG is a hard register.  If REG is a
     276                 :             :    reload pseudo created by this constraints pass, assume that it will
     277                 :             :    be allocated a hard register from its allocno class, but allow that
     278                 :             :    class to be narrowed to CL if it is currently a superset of CL and
     279                 :             :    if either:
     280                 :             : 
     281                 :             :    - ALLOW_ALL_RELOAD_CLASS_CHANGES_P is true or
     282                 :             :    - the instruction we're processing is not a reload move.
     283                 :             : 
     284                 :             :    If NEW_CLASS is nonnull, set *NEW_CLASS to the new allocno class of
     285                 :             :    REGNO (reg), or NO_REGS if no change in its class was needed.  */
     286                 :             : static bool
     287                 :   209994933 : in_class_p (rtx reg, enum reg_class cl, enum reg_class *new_class,
     288                 :             :             bool allow_all_reload_class_changes_p = false)
     289                 :             : {
     290                 :   209994933 :   enum reg_class rclass, common_class;
     291                 :   209994933 :   machine_mode reg_mode;
     292                 :   209994933 :   rtx src;
     293                 :   209994933 :   int regno = REGNO (reg);
     294                 :             : 
     295                 :   209994933 :   if (new_class != NULL)
     296                 :   107215467 :     *new_class = NO_REGS;
     297                 :   209994933 :   if (regno < FIRST_PSEUDO_REGISTER)
     298                 :             :     {
     299                 :    26781348 :       rtx final_reg = reg;
     300                 :    26781348 :       rtx *final_loc = &final_reg;
     301                 :             : 
     302                 :    26781348 :       lra_eliminate_reg_if_possible (final_loc);
     303                 :    26781348 :       return TEST_HARD_REG_BIT (reg_class_contents[cl], REGNO (*final_loc));
     304                 :             :     }
     305                 :   183213585 :   reg_mode = GET_MODE (reg);
     306                 :   183213585 :   rclass = get_reg_class (regno);
     307                 :   183213585 :   src = curr_insn_set != NULL ? SET_SRC (curr_insn_set) : NULL;
     308                 :   183213585 :   if (regno < new_regno_start
     309                 :             :       /* Do not allow the constraints for reload instructions to
     310                 :             :          influence the classes of new pseudos.  These reloads are
     311                 :             :          typically moves that have many alternatives, and restricting
     312                 :             :          reload pseudos for one alternative may lead to situations
     313                 :             :          where other reload pseudos are no longer allocatable.  */
     314                 :   183213585 :       || (!allow_all_reload_class_changes_p
     315                 :    14860468 :           && INSN_UID (curr_insn) >= new_insn_uid_start
     316                 :    14356550 :           && src != NULL
     317                 :    14356550 :           && ((REG_P (src) || MEM_P (src))
     318                 :     1536855 :               || (GET_CODE (src) == SUBREG
     319                 :      817143 :                   && (REG_P (SUBREG_REG (src)) || MEM_P (SUBREG_REG (src)))))))
     320                 :             :     /* When we don't know what class will be used finally for reload
     321                 :             :        pseudos, we use ALL_REGS.  */
     322                 :    13636838 :     return ((regno >= new_regno_start && rclass == ALL_REGS)
     323                 :   178558496 :             || (rclass != NO_REGS && ira_class_subset_p[rclass][cl]
     324                 :   191072738 :                 && ! hard_reg_set_subset_p (reg_class_contents[cl],
     325                 :             :                                             lra_no_alloc_regs)));
     326                 :             :   else
     327                 :             :     {
     328                 :    18289773 :       common_class = ira_reg_class_subset[rclass][cl];
     329                 :    18289773 :       if (new_class != NULL)
     330                 :     5059588 :         *new_class = common_class;
     331                 :    18289773 :       return (enough_allocatable_hard_regs_p (common_class, reg_mode)
     332                 :             :               /* Do not permit reload insn operand matching (new_class == NULL
     333                 :             :                  case) if the new class is too small.  */
     334                 :    18289773 :               && (new_class != NULL || common_class == rclass
     335                 :      923639 :                   || !SMALL_REGISTER_CLASS_P (common_class)));
     336                 :             :     }
     337                 :             : }
     338                 :             : 
     339                 :             : /* Return true if REGNO satisfies a memory constraint.  */
     340                 :             : static bool
     341                 :    61578649 : in_mem_p (int regno)
     342                 :             : {
     343                 :           0 :   return get_reg_class (regno) == NO_REGS;
     344                 :             : }
     345                 :             : 
     346                 :             : /* Return true if ADDR is a valid memory address for mode MODE in address
     347                 :             :    space AS, and check that each pseudo has the proper kind of hard
     348                 :             :    reg.  */
     349                 :             : static bool
     350                 :    33806453 : valid_address_p (machine_mode mode ATTRIBUTE_UNUSED,
     351                 :             :                  rtx addr, addr_space_t as)
     352                 :             : {
     353                 :             : #ifdef GO_IF_LEGITIMATE_ADDRESS
     354                 :             :   lra_assert (ADDR_SPACE_GENERIC_P (as));
     355                 :             :   GO_IF_LEGITIMATE_ADDRESS (mode, addr, win);
     356                 :             :   return false;
     357                 :             : 
     358                 :             :  win:
     359                 :             :   return true;
     360                 :             : #else
     361                 :           0 :   return targetm.addr_space.legitimate_address_p (mode, addr, 0, as,
     362                 :    33806453 :                                                   ERROR_MARK);
     363                 :             : #endif
     364                 :             : }
     365                 :             : 
     366                 :             : namespace {
     367                 :             :   /* Temporarily eliminates registers in an address (for the lifetime of
     368                 :             :      the object).  */
     369                 :             :   class address_eliminator {
     370                 :             :   public:
     371                 :             :     address_eliminator (struct address_info *ad);
     372                 :             :     ~address_eliminator ();
     373                 :             : 
     374                 :             :   private:
     375                 :             :     struct address_info *m_ad;
     376                 :             :     rtx *m_base_loc;
     377                 :             :     rtx m_base_reg;
     378                 :             :     rtx *m_index_loc;
     379                 :             :     rtx m_index_reg;
     380                 :             :   };
     381                 :             : }
     382                 :             : 
     383                 :    71034155 : address_eliminator::address_eliminator (struct address_info *ad)
     384                 :    71034155 :   : m_ad (ad),
     385                 :    71034155 :     m_base_loc (strip_subreg (ad->base_term)),
     386                 :    71034155 :     m_base_reg (NULL_RTX),
     387                 :    71034155 :     m_index_loc (strip_subreg (ad->index_term)),
     388                 :    71034155 :     m_index_reg (NULL_RTX)
     389                 :             : {
     390                 :    71034155 :   if (m_base_loc != NULL)
     391                 :             :     {
     392                 :    58923875 :       m_base_reg = *m_base_loc;
     393                 :             :       /* If we have non-legitimate address which is decomposed not in
     394                 :             :          the way we expected, don't do elimination here.  In such case
     395                 :             :          the address will be reloaded and elimination will be done in
     396                 :             :          reload insn finally.  */
     397                 :    58923875 :       if (REG_P (m_base_reg))
     398                 :    58923875 :         lra_eliminate_reg_if_possible (m_base_loc);
     399                 :    58923875 :       if (m_ad->base_term2 != NULL)
     400                 :           0 :         *m_ad->base_term2 = *m_ad->base_term;
     401                 :             :     }
     402                 :    71034155 :   if (m_index_loc != NULL)
     403                 :             :     {
     404                 :     3161931 :       m_index_reg = *m_index_loc;
     405                 :     3161931 :       if (REG_P (m_index_reg))
     406                 :     3161931 :         lra_eliminate_reg_if_possible (m_index_loc);
     407                 :             :     }
     408                 :    71034155 : }
     409                 :             : 
     410                 :    71034155 : address_eliminator::~address_eliminator ()
     411                 :             : {
     412                 :    71034155 :   if (m_base_loc && *m_base_loc != m_base_reg)
     413                 :             :     {
     414                 :    42146937 :       *m_base_loc = m_base_reg;
     415                 :    42146937 :       if (m_ad->base_term2 != NULL)
     416                 :           0 :         *m_ad->base_term2 = *m_ad->base_term;
     417                 :             :     }
     418                 :    71034155 :   if (m_index_loc && *m_index_loc != m_index_reg)
     419                 :           0 :     *m_index_loc = m_index_reg;
     420                 :    71034155 : }
     421                 :             : 
     422                 :             : /* Return true if the eliminated form of AD is a legitimate target address.
     423                 :             :    If OP is a MEM, AD is the address within OP, otherwise OP should be
     424                 :             :    ignored.  CONSTRAINT is one constraint that the operand may need
     425                 :             :    to meet.  */
     426                 :             : static bool
     427                 :    33784545 : valid_address_p (rtx op, struct address_info *ad,
     428                 :             :                  enum constraint_num constraint)
     429                 :             : {
     430                 :    33784545 :   address_eliminator eliminator (ad);
     431                 :             : 
     432                 :             :   /* Allow a memory OP if it matches CONSTRAINT, even if CONSTRAINT is more
     433                 :             :      forgiving than "m".
     434                 :             :      Need to extract memory from op for special memory constraint,
     435                 :             :      i.e. bcst_mem_operand in i386 backend.  */
     436                 :    33784545 :   if (MEM_P (extract_mem_from_operand (op))
     437                 :             :       && insn_extra_relaxed_memory_constraint (constraint)
     438                 :             :       && constraint_satisfied_p (op, constraint))
     439                 :             :     return true;
     440                 :             : 
     441                 :    33784545 :   return valid_address_p (ad->mode, *ad->outer, ad->as);
     442                 :    33784545 : }
     443                 :             : 
     444                 :             : /* For special_memory_operand, it could be false for MEM_P (op),
     445                 :             :    i.e. bcst_mem_operand in i386 backend.
     446                 :             :    Extract and return real memory operand or op.  */
     447                 :             : rtx
     448                 :   597273530 : extract_mem_from_operand (rtx op)
     449                 :             : {
     450                 :   598881565 :   for (rtx x = op;; x = XEXP (x, 0))
     451                 :             :     {
     452                 :   598881565 :       if (MEM_P (x))
     453                 :             :         return x;
     454                 :   426252505 :       if (GET_RTX_LENGTH (GET_CODE (x)) != 1
     455                 :   349143582 :           || GET_RTX_FORMAT (GET_CODE (x))[0] != 'e')
     456                 :             :         break;
     457                 :             :     }
     458                 :             :   return op;
     459                 :             : }
     460                 :             : 
     461                 :             : /* Return true if the eliminated form of memory reference OP satisfies
     462                 :             :    extra (special) memory constraint CONSTRAINT.  */
     463                 :             : static bool
     464                 :    35145457 : satisfies_memory_constraint_p (rtx op, enum constraint_num constraint)
     465                 :             : {
     466                 :    35145457 :   struct address_info ad;
     467                 :    35145457 :   rtx mem = extract_mem_from_operand (op);
     468                 :    35145457 :   if (!MEM_P (mem))
     469                 :             :     return false;
     470                 :             : 
     471                 :    34122707 :   decompose_mem_address (&ad, mem);
     472                 :    34122707 :   address_eliminator eliminator (&ad);
     473                 :    34122707 :   return constraint_satisfied_p (op, constraint);
     474                 :    34122707 : }
     475                 :             : 
     476                 :             : /* Return true if the eliminated form of address AD satisfies extra
     477                 :             :    address constraint CONSTRAINT.  */
     478                 :             : static bool
     479                 :     3126903 : satisfies_address_constraint_p (struct address_info *ad,
     480                 :             :                                 enum constraint_num constraint)
     481                 :             : {
     482                 :     3126903 :   address_eliminator eliminator (ad);
     483                 :     3126903 :   return constraint_satisfied_p (*ad->outer, constraint);
     484                 :     3126903 : }
     485                 :             : 
     486                 :             : /* Return true if the eliminated form of address OP satisfies extra
     487                 :             :    address constraint CONSTRAINT.  */
     488                 :             : static bool
     489                 :     1531943 : satisfies_address_constraint_p (rtx op, enum constraint_num constraint)
     490                 :             : {
     491                 :     1531943 :   struct address_info ad;
     492                 :             : 
     493                 :     1531943 :   decompose_lea_address (&ad, &op);
     494                 :     1531943 :   return satisfies_address_constraint_p (&ad, constraint);
     495                 :             : }
     496                 :             : 
     497                 :             : /* Initiate equivalences for LRA.  As we keep original equivalences
     498                 :             :    before any elimination, we need to make copies otherwise any change
     499                 :             :    in insns might change the equivalences.  */
     500                 :             : void
     501                 :     1435841 : lra_init_equiv (void)
     502                 :             : {
     503                 :     1435841 :   ira_expand_reg_equiv ();
     504                 :    67068107 :   for (int i = FIRST_PSEUDO_REGISTER; i < max_reg_num (); i++)
     505                 :             :     {
     506                 :    65632266 :       rtx res;
     507                 :             : 
     508                 :    65632266 :       if ((res = ira_reg_equiv[i].memory) != NULL_RTX)
     509                 :     2877068 :         ira_reg_equiv[i].memory = copy_rtx (res);
     510                 :    65632266 :       if ((res = ira_reg_equiv[i].invariant) != NULL_RTX)
     511                 :      750101 :         ira_reg_equiv[i].invariant = copy_rtx (res);
     512                 :             :     }
     513                 :     1435841 : }
     514                 :             : 
     515                 :             : static rtx loc_equivalence_callback (rtx, const_rtx, void *);
     516                 :             : 
     517                 :             : /* Update equivalence for REGNO.  We need to this as the equivalence
     518                 :             :    might contain other pseudos which are changed by their
     519                 :             :    equivalences.  */
     520                 :             : static void
     521                 :   193878520 : update_equiv (int regno)
     522                 :             : {
     523                 :   193878520 :   rtx x;
     524                 :             : 
     525                 :   193878520 :   if ((x = ira_reg_equiv[regno].memory) != NULL_RTX)
     526                 :     8692024 :     ira_reg_equiv[regno].memory
     527                 :     8692024 :       = simplify_replace_fn_rtx (x, NULL_RTX, loc_equivalence_callback,
     528                 :             :                                  NULL_RTX);
     529                 :   193878520 :   if ((x = ira_reg_equiv[regno].invariant) != NULL_RTX)
     530                 :     2287714 :     ira_reg_equiv[regno].invariant
     531                 :     2287714 :       = simplify_replace_fn_rtx (x, NULL_RTX, loc_equivalence_callback,
     532                 :             :                                  NULL_RTX);
     533                 :   193878520 : }
     534                 :             : 
     535                 :             : /* If we have decided to substitute X with another value, return that
     536                 :             :    value, otherwise return X.  */
     537                 :             : static rtx
     538                 :   417606840 : get_equiv (rtx x)
     539                 :             : {
     540                 :   417606840 :   int regno;
     541                 :   417606840 :   rtx res;
     542                 :             : 
     543                 :   281965996 :   if (! REG_P (x) || (regno = REGNO (x)) < FIRST_PSEUDO_REGISTER
     544                 :   186221399 :       || ! ira_reg_equiv[regno].defined_p
     545                 :    23978826 :       || ! ira_reg_equiv[regno].profitable_p
     546                 :   441549097 :       || lra_get_regno_hard_regno (regno) >= 0)
     547                 :   413159735 :     return x;
     548                 :     4447105 :   if ((res = ira_reg_equiv[regno].memory) != NULL_RTX)
     549                 :             :     {
     550                 :     2100315 :       if (targetm.cannot_substitute_mem_equiv_p (res))
     551                 :             :         return x;
     552                 :             :       return res;
     553                 :             :     }
     554                 :     2346790 :   if ((res = ira_reg_equiv[regno].constant) != NULL_RTX)
     555                 :             :     return res;
     556                 :     1614775 :   if ((res = ira_reg_equiv[regno].invariant) != NULL_RTX)
     557                 :             :     return res;
     558                 :           0 :   gcc_unreachable ();
     559                 :             : }
     560                 :             : 
     561                 :             : /* If we have decided to substitute X with the equivalent value,
     562                 :             :    return that value after elimination for INSN, otherwise return
     563                 :             :    X.  */
     564                 :             : static rtx
     565                 :   234737115 : get_equiv_with_elimination (rtx x, rtx_insn *insn)
     566                 :             : {
     567                 :   234737115 :   rtx res = get_equiv (x);
     568                 :             : 
     569                 :   234737115 :   if (x == res || CONSTANT_P (res))
     570                 :             :     return res;
     571                 :     1358420 :   return lra_eliminate_regs_1 (insn, res, GET_MODE (res),
     572                 :     1358420 :                                false, false, 0, true);
     573                 :             : }
     574                 :             : 
     575                 :             : /* Set up curr_operand_mode.  */
     576                 :             : static void
     577                 :   101703239 : init_curr_operand_mode (void)
     578                 :             : {
     579                 :   101703239 :   int nop = curr_static_id->n_operands;
     580                 :   317192054 :   for (int i = 0; i < nop; i++)
     581                 :             :     {
     582                 :   215488815 :       machine_mode mode = GET_MODE (*curr_id->operand_loc[i]);
     583                 :   215488815 :       if (mode == VOIDmode)
     584                 :             :         {
     585                 :             :           /* The .md mode for address operands is the mode of the
     586                 :             :              addressed value rather than the mode of the address itself.  */
     587                 :    41659857 :           if (curr_id->icode >= 0 && curr_static_id->operand[i].is_address)
     588                 :         115 :             mode = Pmode;
     589                 :             :           else
     590                 :    41659742 :             mode = curr_static_id->operand[i].mode;
     591                 :             :         }
     592                 :   215488815 :       curr_operand_mode[i] = mode;
     593                 :             :     }
     594                 :   101703239 : }
     595                 :             : 
     596                 :             : 
     597                 :             : 
     598                 :             : /* The page contains code to reuse input reloads.  */
     599                 :             : 
     600                 :             : /* Structure describes input reload of the current insns.  */
     601                 :             : struct input_reload
     602                 :             : {
     603                 :             :   /* True for input reload of matched operands.  */
     604                 :             :   bool match_p;
     605                 :             :   /* True for input reload of inout earlyclobber operand.  */
     606                 :             :   bool early_clobber_p;
     607                 :             :   /* Reloaded value.  */
     608                 :             :   rtx input;
     609                 :             :   /* Reload pseudo used.  */
     610                 :             :   rtx reg;
     611                 :             : };
     612                 :             : 
     613                 :             : /* The number of elements in the following array.  */
     614                 :             : static int curr_insn_input_reloads_num;
     615                 :             : /* Array containing info about input reloads.  It is used to find the
     616                 :             :    same input reload and reuse the reload pseudo in this case.  */
     617                 :             : static struct input_reload curr_insn_input_reloads[LRA_MAX_INSN_RELOADS];
     618                 :             : 
     619                 :             : /* Initiate data concerning reuse of input reloads for the current
     620                 :             :    insn.  */
     621                 :             : static void
     622                 :   101703239 : init_curr_insn_input_reloads (void)
     623                 :             : {
     624                 :   101703239 :   curr_insn_input_reloads_num = 0;
     625                 :           0 : }
     626                 :             : 
     627                 :             : /* The canonical form of an rtx inside a MEM is not necessarily the same as the
     628                 :             :    canonical form of the rtx outside the MEM.  Fix this up in the case that
     629                 :             :    we're reloading an address (and therefore pulling it outside a MEM).  */
     630                 :             : static rtx
     631                 :          72 : canonicalize_reload_addr (rtx addr)
     632                 :             : {
     633                 :          72 :   subrtx_var_iterator::array_type array;
     634                 :         246 :   FOR_EACH_SUBRTX_VAR (iter, array, addr, NONCONST)
     635                 :             :     {
     636                 :         174 :       rtx x = *iter;
     637                 :         174 :       if (GET_CODE (x) == MULT && CONST_INT_P (XEXP (x, 1)))
     638                 :             :         {
     639                 :          14 :           const HOST_WIDE_INT ci = INTVAL (XEXP (x, 1));
     640                 :         188 :           const int pwr2 = exact_log2 (ci);
     641                 :          14 :           if (pwr2 > 0)
     642                 :             :             {
     643                 :             :               /* Rewrite this to use a shift instead, which is canonical when
     644                 :             :                  outside of a MEM.  */
     645                 :          14 :               PUT_CODE (x, ASHIFT);
     646                 :          14 :               XEXP (x, 1) = GEN_INT (pwr2);
     647                 :             :             }
     648                 :             :         }
     649                 :             :     }
     650                 :             : 
     651                 :          72 :   return addr;
     652                 :          72 : }
     653                 :             : 
     654                 :             : /* Create a new pseudo using MODE, RCLASS, EXCLUDE_START_HARD_REGS, ORIGINAL or
     655                 :             :    reuse an existing reload pseudo.  Don't reuse an existing reload pseudo if
     656                 :             :    IN_SUBREG_P is true and the reused pseudo should be wrapped up in a SUBREG.
     657                 :             :    EARLY_CLOBBER_P is true for input reload of inout early clobber operand.
     658                 :             :    The result pseudo is returned through RESULT_REG.  Return TRUE if we created
     659                 :             :    a new pseudo, FALSE if we reused an existing reload pseudo.  Use TITLE to
     660                 :             :    describe new registers for debug purposes.  */
     661                 :             : static bool
     662                 :     3660117 : get_reload_reg (enum op_type type, machine_mode mode, rtx original,
     663                 :             :                 enum reg_class rclass, HARD_REG_SET *exclude_start_hard_regs,
     664                 :             :                 bool in_subreg_p, bool early_clobber_p,
     665                 :             :                 const char *title, rtx *result_reg)
     666                 :             : {
     667                 :     3660117 :   int i, regno;
     668                 :     3660117 :   enum reg_class new_class;
     669                 :             : 
     670                 :     3660117 :   if (type == OP_OUT)
     671                 :             :     {
     672                 :             :       /* Output reload registers tend to start out with a conservative
     673                 :             :          choice of register class.  Usually this is ALL_REGS, although
     674                 :             :          a target might narrow it (for performance reasons) through
     675                 :             :          targetm.preferred_reload_class.  It's therefore quite common
     676                 :             :          for a reload instruction to require a more restrictive class
     677                 :             :          than the class that was originally assigned to the reload register.
     678                 :             : 
     679                 :             :          In these situations, it's more efficient to refine the choice
     680                 :             :          of register class rather than create a second reload register.
     681                 :             :          This also helps to avoid cycling for registers that are only
     682                 :             :          used by reload instructions.  */
     683                 :      967110 :       if (REG_P (original)
     684                 :      719010 :           && (int) REGNO (original) >= new_regno_start
     685                 :        4491 :           && (INSN_UID (curr_insn) >= new_insn_uid_start
     686                 :         250 :               || ira_former_scratch_p (REGNO (original)))
     687                 :      971601 :           && in_class_p (original, rclass, &new_class, true))
     688                 :             :         {
     689                 :         250 :           unsigned int regno = REGNO (original);
     690                 :         250 :           if (lra_dump_file != NULL)
     691                 :             :             {
     692                 :           0 :               fprintf (lra_dump_file, "     Reuse r%d for output ", regno);
     693                 :           0 :               dump_value_slim (lra_dump_file, original, 1);
     694                 :             :             }
     695                 :         500 :           if (new_class != lra_get_allocno_class (regno))
     696                 :         250 :             lra_change_class (regno, new_class, ", change to", false);
     697                 :         250 :           if (lra_dump_file != NULL)
     698                 :           0 :             fprintf (lra_dump_file, "\n");
     699                 :         250 :           *result_reg = original;
     700                 :         250 :           return false;
     701                 :             :         }
     702                 :      966860 :       *result_reg
     703                 :      966860 :         = lra_create_new_reg_with_unique_value (mode, original, rclass,
     704                 :             :                                                 exclude_start_hard_regs, title);
     705                 :      966860 :       return true;
     706                 :             :     }
     707                 :             : 
     708                 :     2693007 :   bool unique_p = early_clobber_p;
     709                 :             :   /* Prevent reuse value of expression with side effects,
     710                 :             :      e.g. volatile memory.  */
     711                 :     2693007 :   if (! side_effects_p (original))
     712                 :     2926185 :     for (i = 0; i < curr_insn_input_reloads_num; i++)
     713                 :             :       {
     714                 :      241962 :         if (! curr_insn_input_reloads[i].match_p
     715                 :       97712 :             && ! curr_insn_input_reloads[i].early_clobber_p
     716                 :       97710 :             && rtx_equal_p (curr_insn_input_reloads[i].input, original)
     717                 :      250758 :             && in_class_p (curr_insn_input_reloads[i].reg, rclass, &new_class))
     718                 :             :           {
     719                 :        8784 :             rtx reg = curr_insn_input_reloads[i].reg;
     720                 :        8784 :             regno = REGNO (reg);
     721                 :             :             /* If input is equal to original and both are VOIDmode,
     722                 :             :                GET_MODE (reg) might be still different from mode.
     723                 :             :                Ensure we don't return *result_reg with wrong mode.  */
     724                 :        8784 :             if (GET_MODE (reg) != mode)
     725                 :             :               {
     726                 :           0 :                 if (in_subreg_p)
     727                 :           0 :                   continue;
     728                 :           0 :                 if (maybe_lt (GET_MODE_SIZE (GET_MODE (reg)),
     729                 :           0 :                               GET_MODE_SIZE (mode)))
     730                 :           0 :                   continue;
     731                 :           0 :                 reg = lowpart_subreg (mode, reg, GET_MODE (reg));
     732                 :           0 :                 if (reg == NULL_RTX || GET_CODE (reg) != SUBREG)
     733                 :           0 :                   continue;
     734                 :             :               }
     735                 :        8784 :             *result_reg = reg;
     736                 :        8784 :             if (lra_dump_file != NULL)
     737                 :             :               {
     738                 :           0 :                 fprintf (lra_dump_file, "   Reuse r%d for reload ", regno);
     739                 :           0 :                 dump_value_slim (lra_dump_file, original, 1);
     740                 :             :               }
     741                 :       17568 :             if (new_class != lra_get_allocno_class (regno))
     742                 :        4856 :               lra_change_class (regno, new_class, ", change to", false);
     743                 :        8784 :             if (lra_dump_file != NULL)
     744                 :           0 :               fprintf (lra_dump_file, "\n");
     745                 :        8784 :             return false;
     746                 :             :           }
     747                 :             :         /* If we have an input reload with a different mode, make sure it
     748                 :             :            will get a different hard reg.  */
     749                 :      233178 :         else if (REG_P (original)
     750                 :      180357 :                  && REG_P (curr_insn_input_reloads[i].input)
     751                 :      152584 :                  && REGNO (original) == REGNO (curr_insn_input_reloads[i].input)
     752                 :      233178 :                  && (GET_MODE (original)
     753                 :        3111 :                      != GET_MODE (curr_insn_input_reloads[i].input)))
     754                 :             :           unique_p = true;
     755                 :             :       }
     756                 :     5368446 :   *result_reg = (unique_p
     757                 :     2684223 :                  ? lra_create_new_reg_with_unique_value
     758                 :     2684223 :                  : lra_create_new_reg) (mode, original, rclass,
     759                 :             :                                         exclude_start_hard_regs, title);
     760                 :     2684223 :   lra_assert (curr_insn_input_reloads_num < LRA_MAX_INSN_RELOADS);
     761                 :     2684223 :   curr_insn_input_reloads[curr_insn_input_reloads_num].input = original;
     762                 :     2684223 :   curr_insn_input_reloads[curr_insn_input_reloads_num].match_p = false;
     763                 :     2684223 :   curr_insn_input_reloads[curr_insn_input_reloads_num].early_clobber_p
     764                 :     2684223 :     = early_clobber_p;
     765                 :     2684223 :   curr_insn_input_reloads[curr_insn_input_reloads_num++].reg = *result_reg;
     766                 :     2684223 :   return true;
     767                 :             : }
     768                 :             : 
     769                 :             : 
     770                 :             : /* The page contains major code to choose the current insn alternative
     771                 :             :    and generate reloads for it.  */
     772                 :             : 
     773                 :             : /* Return the offset from REGNO of the least significant register
     774                 :             :    in (reg:MODE REGNO).
     775                 :             : 
     776                 :             :    This function is used to tell whether two registers satisfy
     777                 :             :    a matching constraint.  (reg:MODE1 REGNO1) matches (reg:MODE2 REGNO2) if:
     778                 :             : 
     779                 :             :          REGNO1 + lra_constraint_offset (REGNO1, MODE1)
     780                 :             :          == REGNO2 + lra_constraint_offset (REGNO2, MODE2)  */
     781                 :             : int
     782                 :    41868272 : lra_constraint_offset (int regno, machine_mode mode)
     783                 :             : {
     784                 :    41868272 :   lra_assert (regno < FIRST_PSEUDO_REGISTER);
     785                 :             : 
     786                 :    41868272 :   scalar_int_mode int_mode;
     787                 :    41868272 :   if (WORDS_BIG_ENDIAN
     788                 :             :       && is_a <scalar_int_mode> (mode, &int_mode)
     789                 :             :       && GET_MODE_SIZE (int_mode) > UNITS_PER_WORD)
     790                 :             :     return hard_regno_nregs (regno, mode) - 1;
     791                 :    41868272 :   return 0;
     792                 :             : }
     793                 :             : 
     794                 :             : /* Like rtx_equal_p except that it allows a REG and a SUBREG to match
     795                 :             :    if they are the same hard reg, and has special hacks for
     796                 :             :    auto-increment and auto-decrement.  This is specifically intended for
     797                 :             :    process_alt_operands to use in determining whether two operands
     798                 :             :    match.  X is the operand whose number is the lower of the two.
     799                 :             : 
     800                 :             :    It is supposed that X is the output operand and Y is the input
     801                 :             :    operand.  Y_HARD_REGNO is the final hard regno of register Y or
     802                 :             :    register in subreg Y as we know it now.  Otherwise, it is a
     803                 :             :    negative value.  */
     804                 :             : static bool
     805                 :    55939875 : operands_match_p (rtx x, rtx y, int y_hard_regno)
     806                 :             : {
     807                 :    55939875 :   int i;
     808                 :    55939875 :   RTX_CODE code = GET_CODE (x);
     809                 :    55939875 :   const char *fmt;
     810                 :             : 
     811                 :    55939875 :   if (x == y)
     812                 :             :     return true;
     813                 :    48452076 :   if ((code == REG || (code == SUBREG && REG_P (SUBREG_REG (x))))
     814                 :    22855236 :       && (REG_P (y) || (GET_CODE (y) == SUBREG && REG_P (SUBREG_REG (y)))))
     815                 :             :     {
     816                 :    22768376 :       int j;
     817                 :             : 
     818                 :    22768376 :       i = get_hard_regno (x);
     819                 :    22768376 :       if (i < 0)
     820                 :     1175630 :         goto slow;
     821                 :             : 
     822                 :    21592746 :       if ((j = y_hard_regno) < 0)
     823                 :      658610 :         goto slow;
     824                 :             : 
     825                 :    20934136 :       i += lra_constraint_offset (i, GET_MODE (x));
     826                 :    20934136 :       j += lra_constraint_offset (j, GET_MODE (y));
     827                 :             : 
     828                 :    20934136 :       return i == j;
     829                 :             :     }
     830                 :             : 
     831                 :             :   /* If two operands must match, because they are really a single
     832                 :             :      operand of an assembler insn, then two post-increments are invalid
     833                 :             :      because the assembler insn would increment only once.  On the
     834                 :             :      other hand, a post-increment matches ordinary indexing if the
     835                 :             :      post-increment is the output operand.  */
     836                 :    25683700 :   if (code == POST_DEC || code == POST_INC || code == POST_MODIFY)
     837                 :           0 :     return operands_match_p (XEXP (x, 0), y, y_hard_regno);
     838                 :             : 
     839                 :             :   /* Two pre-increments are invalid because the assembler insn would
     840                 :             :      increment only once.  On the other hand, a pre-increment matches
     841                 :             :      ordinary indexing if the pre-increment is the input operand.  */
     842                 :    25683700 :   if (GET_CODE (y) == PRE_DEC || GET_CODE (y) == PRE_INC
     843                 :    25683700 :       || GET_CODE (y) == PRE_MODIFY)
     844                 :           0 :     return operands_match_p (x, XEXP (y, 0), -1);
     845                 :             : 
     846                 :    25683700 :  slow:
     847                 :             : 
     848                 :    27517940 :   if (code == REG && REG_P (y))
     849                 :     1741766 :     return REGNO (x) == REGNO (y);
     850                 :             : 
     851                 :       86418 :   if (code == REG && GET_CODE (y) == SUBREG && REG_P (SUBREG_REG (y))
     852                 :        6862 :       && x == SUBREG_REG (y))
     853                 :             :     return true;
     854                 :    25776174 :   if (GET_CODE (y) == REG && code == SUBREG && REG_P (SUBREG_REG (x))
     855                 :       60441 :       && SUBREG_REG (x) == y)
     856                 :             :     return true;
     857                 :             : 
     858                 :             :   /* Now we have disposed of all the cases in which different rtx
     859                 :             :      codes can match.  */
     860                 :    25776025 :   if (code != GET_CODE (y))
     861                 :             :     return false;
     862                 :             : 
     863                 :             :   /* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent.  */
     864                 :      928745 :   if (GET_MODE (x) != GET_MODE (y))
     865                 :             :     return false;
     866                 :             : 
     867                 :      928050 :   switch (code)
     868                 :             :     {
     869                 :             :     CASE_CONST_UNIQUE:
     870                 :             :       return false;
     871                 :             : 
     872                 :             :     case CONST_VECTOR:
     873                 :             :       if (!same_vector_encodings_p (x, y))
     874                 :             :         return false;
     875                 :             :       break;
     876                 :             : 
     877                 :           0 :     case LABEL_REF:
     878                 :           0 :       return label_ref_label (x) == label_ref_label (y);
     879                 :          38 :     case SYMBOL_REF:
     880                 :          38 :       return XSTR (x, 0) == XSTR (y, 0);
     881                 :             : 
     882                 :             :     default:
     883                 :             :       break;
     884                 :             :     }
     885                 :             : 
     886                 :             :   /* Compare the elements.  If any pair of corresponding elements fail
     887                 :             :      to match, return false for the whole things.  */
     888                 :             : 
     889                 :      927861 :   fmt = GET_RTX_FORMAT (code);
     890                 :     2750524 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
     891                 :             :     {
     892                 :     1846862 :       int val, j;
     893                 :     1846862 :       switch (fmt[i])
     894                 :             :         {
     895                 :           0 :         case 'w':
     896                 :           0 :           if (XWINT (x, i) != XWINT (y, i))
     897                 :             :             return false;
     898                 :             :           break;
     899                 :             : 
     900                 :         482 :         case 'i':
     901                 :         482 :           if (XINT (x, i) != XINT (y, i))
     902                 :             :             return false;
     903                 :             :           break;
     904                 :             : 
     905                 :           0 :         case 'L':
     906                 :           0 :           if (XLOC (x, i) != XLOC (y, i))
     907                 :             :             return false;
     908                 :             :           break;
     909                 :             : 
     910                 :       25080 :         case 'p':
     911                 :       25080 :           if (maybe_ne (SUBREG_BYTE (x), SUBREG_BYTE (y)))
     912                 :             :             return false;
     913                 :             :           break;
     914                 :             : 
     915                 :     1355754 :         case 'e':
     916                 :     1355754 :           val = operands_match_p (XEXP (x, i), XEXP (y, i), -1);
     917                 :     1355754 :           if (val == 0)
     918                 :             :             return false;
     919                 :             :           break;
     920                 :             : 
     921                 :             :         case '0':
     922                 :             :           break;
     923                 :             : 
     924                 :         482 :         case 'E':
     925                 :         482 :           if (XVECLEN (x, i) != XVECLEN (y, i))
     926                 :             :             return false;
     927                 :         964 :           for (j = XVECLEN (x, i) - 1; j >= 0; --j)
     928                 :             :             {
     929                 :         482 :               val = operands_match_p (XVECEXP (x, i, j), XVECEXP (y, i, j), -1);
     930                 :         482 :               if (val == 0)
     931                 :             :                 return false;
     932                 :             :             }
     933                 :             :           break;
     934                 :             : 
     935                 :             :           /* It is believed that rtx's at this level will never
     936                 :             :              contain anything but integers and other rtx's, except for
     937                 :             :              within LABEL_REFs and SYMBOL_REFs.  */
     938                 :           0 :         default:
     939                 :           0 :           gcc_unreachable ();
     940                 :             :         }
     941                 :             :     }
     942                 :             :   return true;
     943                 :             : }
     944                 :             : 
     945                 :             : /* True if X is a constant that can be forced into the constant pool.
     946                 :             :    MODE is the mode of the operand, or VOIDmode if not known.  */
     947                 :             : #define CONST_POOL_OK_P(MODE, X)                \
     948                 :             :   ((MODE) != VOIDmode                           \
     949                 :             :    && CONSTANT_P (X)                            \
     950                 :             :    && GET_CODE (X) != HIGH                      \
     951                 :             :    && GET_MODE_SIZE (MODE).is_constant ()       \
     952                 :             :    && !targetm.cannot_force_const_mem (MODE, X))
     953                 :             : 
     954                 :             : /* If REG is a reload pseudo, try to make its class satisfying CL.  */
     955                 :             : static void
     956                 :     3349842 : narrow_reload_pseudo_class (rtx reg, enum reg_class cl)
     957                 :             : {
     958                 :     3349842 :   enum reg_class rclass;
     959                 :             : 
     960                 :             :   /* Do not make more accurate class from reloads generated.  They are
     961                 :             :      mostly moves with a lot of constraints.  Making more accurate
     962                 :             :      class may results in very narrow class and impossibility of find
     963                 :             :      registers for several reloads of one insn.  */
     964                 :     3349842 :   if (INSN_UID (curr_insn) >= new_insn_uid_start)
     965                 :     3349823 :     return;
     966                 :     3349734 :   if (GET_CODE (reg) == SUBREG)
     967                 :      165878 :     reg = SUBREG_REG (reg);
     968                 :     3349734 :   if (! REG_P (reg) || (int) REGNO (reg) < new_regno_start)
     969                 :             :     return;
     970                 :          19 :   if (in_class_p (reg, cl, &rclass) && rclass != cl)
     971                 :           0 :     lra_change_class (REGNO (reg), rclass, "      Change to", true);
     972                 :             : }
     973                 :             : 
     974                 :             : /* Searches X for any reference to a reg with the same value as REGNO,
     975                 :             :    returning the rtx of the reference found if any.  Otherwise,
     976                 :             :    returns NULL_RTX.  */
     977                 :             : static rtx
     978                 :      568995 : regno_val_use_in (unsigned int regno, rtx x)
     979                 :             : {
     980                 :      568995 :   const char *fmt;
     981                 :      568995 :   int i, j;
     982                 :      568995 :   rtx tem;
     983                 :             : 
     984                 :      568995 :   if (REG_P (x) && lra_reg_info[REGNO (x)].val == lra_reg_info[regno].val)
     985                 :             :     return x;
     986                 :             : 
     987                 :      568637 :   fmt = GET_RTX_FORMAT (GET_CODE (x));
     988                 :     1143349 :   for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
     989                 :             :     {
     990                 :      574712 :       if (fmt[i] == 'e')
     991                 :             :         {
     992                 :        7567 :           if ((tem = regno_val_use_in (regno, XEXP (x, i))))
     993                 :             :             return tem;
     994                 :             :         }
     995                 :      567145 :       else if (fmt[i] == 'E')
     996                 :           0 :         for (j = XVECLEN (x, i) - 1; j >= 0; j--)
     997                 :           0 :           if ((tem = regno_val_use_in (regno , XVECEXP (x, i, j))))
     998                 :             :             return tem;
     999                 :             :     }
    1000                 :             : 
    1001                 :             :   return NULL_RTX;
    1002                 :             : }
    1003                 :             : 
    1004                 :             : /* Return true if all current insn non-output operands except INS (it
    1005                 :             :    has a negaitve end marker) do not use pseudos with the same value
    1006                 :             :    as REGNO.  */
    1007                 :             : static bool
    1008                 :           2 : check_conflict_input_operands (int regno, signed char *ins)
    1009                 :             : {
    1010                 :           2 :   int in;
    1011                 :           2 :   int n_operands = curr_static_id->n_operands;
    1012                 :             : 
    1013                 :           8 :   for (int nop = 0; nop < n_operands; nop++)
    1014                 :           7 :     if (! curr_static_id->operand[nop].is_operator
    1015                 :           7 :         && curr_static_id->operand[nop].type != OP_OUT)
    1016                 :             :       {
    1017                 :           5 :         for (int i = 0; (in = ins[i]) >= 0; i++)
    1018                 :           4 :           if (in == nop)
    1019                 :             :             break;
    1020                 :           3 :         if (in < 0
    1021                 :           3 :             && regno_val_use_in (regno, *curr_id->operand_loc[nop]) != NULL_RTX)
    1022                 :             :           return false;
    1023                 :             :       }
    1024                 :             :   return true;
    1025                 :             : }
    1026                 :             : 
    1027                 :             : /* Generate reloads for matching OUT and INS (array of input operand numbers
    1028                 :             :    with end marker -1) with reg class GOAL_CLASS and EXCLUDE_START_HARD_REGS,
    1029                 :             :    considering output operands OUTS (similar array to INS) needing to be in
    1030                 :             :    different registers.  Add input and output reloads correspondingly to the
    1031                 :             :    lists *BEFORE and *AFTER.  OUT might be negative.  In this case we generate
    1032                 :             :    input reloads for matched input operands INS.  EARLY_CLOBBER_P is a flag
    1033                 :             :    that the output operand is early clobbered for chosen alternative.  */
    1034                 :             : static void
    1035                 :     1674921 : match_reload (signed char out, signed char *ins, signed char *outs,
    1036                 :             :               enum reg_class goal_class, HARD_REG_SET *exclude_start_hard_regs,
    1037                 :             :               rtx_insn **before, rtx_insn **after, bool early_clobber_p)
    1038                 :             : {
    1039                 :     1674921 :   bool out_conflict;
    1040                 :     1674921 :   int i, in;
    1041                 :     1674921 :   rtx new_in_reg, new_out_reg, reg;
    1042                 :     1674921 :   machine_mode inmode, outmode;
    1043                 :     1674921 :   rtx in_rtx = *curr_id->operand_loc[ins[0]];
    1044                 :     1674921 :   rtx out_rtx = out < 0 ? in_rtx : *curr_id->operand_loc[out];
    1045                 :             : 
    1046                 :     1674921 :   inmode = curr_operand_mode[ins[0]];
    1047                 :     1674921 :   outmode = out < 0 ? inmode : curr_operand_mode[out];
    1048                 :     1674921 :   push_to_sequence (*before);
    1049                 :     1674921 :   if (inmode != outmode)
    1050                 :             :     {
    1051                 :             :       /* process_alt_operands has already checked that the mode sizes
    1052                 :             :          are ordered.  */
    1053                 :      131501 :       if (partial_subreg_p (outmode, inmode))
    1054                 :             :         {
    1055                 :        1476 :           bool asm_p = asm_noperands (PATTERN (curr_insn)) >= 0;
    1056                 :        1476 :           int hr;
    1057                 :        1476 :           HARD_REG_SET temp_hard_reg_set;
    1058                 :             : 
    1059                 :          19 :           if (asm_p && (hr = get_hard_regno (out_rtx)) >= 0
    1060                 :        1479 :               && hard_regno_nregs (hr, inmode) > 1)
    1061                 :             :             {
    1062                 :             :               /* See gcc.c-torture/execute/20030222-1.c.
    1063                 :             :                  Consider the code for 32-bit (e.g. BE) target:
    1064                 :             :                    int i, v; long x; x = v; asm ("" : "=r" (i) : "0" (x));
    1065                 :             :                  We generate the following RTL with reload insns:
    1066                 :             :                    1. subreg:si(x:di, 0) = 0;
    1067                 :             :                    2. subreg:si(x:di, 4) = v:si;
    1068                 :             :                    3. t:di = x:di, dead x;
    1069                 :             :                    4. asm ("" : "=r" (subreg:si(t:di,4)) : "0" (t:di))
    1070                 :             :                    5. i:si = subreg:si(t:di,4);
    1071                 :             :                  If we assign hard reg of x to t, dead code elimination
    1072                 :             :                  will remove insn #2 and we will use unitialized hard reg.
    1073                 :             :                  So exclude the hard reg of x for t.  We could ignore this
    1074                 :             :                  problem for non-empty asm using all x value but it is hard to
    1075                 :             :                  check that the asm are expanded into insn realy using x
    1076                 :             :                  and setting r.  */
    1077                 :           0 :               CLEAR_HARD_REG_SET (temp_hard_reg_set);
    1078                 :           0 :               if (exclude_start_hard_regs != NULL)
    1079                 :           0 :                 temp_hard_reg_set = *exclude_start_hard_regs;
    1080                 :           0 :               SET_HARD_REG_BIT (temp_hard_reg_set, hr);
    1081                 :           0 :               exclude_start_hard_regs = &temp_hard_reg_set;
    1082                 :             :             }
    1083                 :        2952 :           reg = new_in_reg
    1084                 :        1476 :             = lra_create_new_reg_with_unique_value (inmode, in_rtx, goal_class,
    1085                 :             :                                                     exclude_start_hard_regs,
    1086                 :             :                                                     "");
    1087                 :        1476 :           new_out_reg = gen_lowpart_SUBREG (outmode, reg);
    1088                 :        1476 :           LRA_SUBREG_P (new_out_reg) = 1;
    1089                 :             :           /* If the input reg is dying here, we can use the same hard
    1090                 :             :              register for REG and IN_RTX.  We do it only for original
    1091                 :             :              pseudos as reload pseudos can die although original
    1092                 :             :              pseudos still live where reload pseudos dies.  */
    1093                 :        1353 :           if (REG_P (in_rtx) && (int) REGNO (in_rtx) < lra_new_regno_start
    1094                 :        1312 :               && find_regno_note (curr_insn, REG_DEAD, REGNO (in_rtx))
    1095                 :        2303 :               && (!early_clobber_p
    1096                 :           2 :                   || check_conflict_input_operands(REGNO (in_rtx), ins)))
    1097                 :         826 :             lra_assign_reg_val (REGNO (in_rtx), REGNO (reg));
    1098                 :             :         }
    1099                 :             :       else
    1100                 :             :         {
    1101                 :      260050 :           reg = new_out_reg
    1102                 :      130025 :             = lra_create_new_reg_with_unique_value (outmode, out_rtx,
    1103                 :             :                                                     goal_class,
    1104                 :             :                                                     exclude_start_hard_regs,
    1105                 :             :                                                     "");
    1106                 :      130025 :           new_in_reg = gen_lowpart_SUBREG (inmode, reg);
    1107                 :             :           /* NEW_IN_REG is non-paradoxical subreg.  We don't want
    1108                 :             :              NEW_OUT_REG living above.  We add clobber clause for
    1109                 :             :              this.  This is just a temporary clobber.  We can remove
    1110                 :             :              it at the end of LRA work.  */
    1111                 :      130025 :           rtx_insn *clobber = emit_clobber (new_out_reg);
    1112                 :      130025 :           LRA_TEMP_CLOBBER_P (PATTERN (clobber)) = 1;
    1113                 :      130025 :           LRA_SUBREG_P (new_in_reg) = 1;
    1114                 :      130025 :           if (GET_CODE (in_rtx) == SUBREG)
    1115                 :             :             {
    1116                 :        1715 :               rtx subreg_reg = SUBREG_REG (in_rtx);
    1117                 :             : 
    1118                 :             :               /* If SUBREG_REG is dying here and sub-registers IN_RTX
    1119                 :             :                  and NEW_IN_REG are similar, we can use the same hard
    1120                 :             :                  register for REG and SUBREG_REG.  */
    1121                 :        1715 :               if (REG_P (subreg_reg)
    1122                 :        1715 :                   && (int) REGNO (subreg_reg) < lra_new_regno_start
    1123                 :        1715 :                   && GET_MODE (subreg_reg) == outmode
    1124                 :         970 :                   && known_eq (SUBREG_BYTE (in_rtx), SUBREG_BYTE (new_in_reg))
    1125                 :         970 :                   && find_regno_note (curr_insn, REG_DEAD, REGNO (subreg_reg))
    1126                 :        1852 :                   && (! early_clobber_p
    1127                 :           0 :                       || check_conflict_input_operands (REGNO (subreg_reg),
    1128                 :             :                                                         ins)))
    1129                 :         137 :                 lra_assign_reg_val (REGNO (subreg_reg), REGNO (reg));
    1130                 :             :             }
    1131                 :             :         }
    1132                 :             :     }
    1133                 :             :   else
    1134                 :             :     {
    1135                 :             :       /* Pseudos have values -- see comments for lra_reg_info.
    1136                 :             :          Different pseudos with the same value do not conflict even if
    1137                 :             :          they live in the same place.  When we create a pseudo we
    1138                 :             :          assign value of original pseudo (if any) from which we
    1139                 :             :          created the new pseudo.  If we create the pseudo from the
    1140                 :             :          input pseudo, the new pseudo will have no conflict with the
    1141                 :             :          input pseudo which is wrong when the input pseudo lives after
    1142                 :             :          the insn and as the new pseudo value is changed by the insn
    1143                 :             :          output.  Therefore we create the new pseudo from the output
    1144                 :             :          except the case when we have single matched dying input
    1145                 :             :          pseudo.
    1146                 :             : 
    1147                 :             :          We cannot reuse the current output register because we might
    1148                 :             :          have a situation like "a <- a op b", where the constraints
    1149                 :             :          force the second input operand ("b") to match the output
    1150                 :             :          operand ("a").  "b" must then be copied into a new register
    1151                 :             :          so that it doesn't clobber the current value of "a".
    1152                 :             : 
    1153                 :             :          We cannot use the same value if the output pseudo is
    1154                 :             :          early clobbered or the input pseudo is mentioned in the
    1155                 :             :          output, e.g. as an address part in memory, because
    1156                 :             :          output reload will actually extend the pseudo liveness.
    1157                 :             :          We don't care about eliminable hard regs here as we are
    1158                 :             :          interesting only in pseudos.  */
    1159                 :             : 
    1160                 :             :       /* Matching input's register value is the same as one of the other
    1161                 :             :          output operand.  Output operands in a parallel insn must be in
    1162                 :             :          different registers.  */
    1163                 :     1543420 :       out_conflict = false;
    1164                 :     1543420 :       if (REG_P (in_rtx))
    1165                 :             :         {
    1166                 :     2720843 :           for (i = 0; outs[i] >= 0; i++)
    1167                 :             :             {
    1168                 :     1437572 :               rtx other_out_rtx = *curr_id->operand_loc[outs[i]];
    1169                 :      154081 :               if (outs[i] != out && REG_P (other_out_rtx)
    1170                 :     1591487 :                   && (regno_val_use_in (REGNO (in_rtx), other_out_rtx)
    1171                 :             :                       != NULL_RTX))
    1172                 :             :                 {
    1173                 :             :                   out_conflict = true;
    1174                 :             :                   break;
    1175                 :             :                 }
    1176                 :             :             }
    1177                 :             :         }
    1178                 :             : 
    1179                 :     1543420 :       new_in_reg = new_out_reg
    1180                 :     1512419 :         = (! early_clobber_p && ins[1] < 0 && REG_P (in_rtx)
    1181                 :     1253792 :            && (int) REGNO (in_rtx) < lra_new_regno_start
    1182                 :     1253480 :            && find_regno_note (curr_insn, REG_DEAD, REGNO (in_rtx))
    1183                 :             :            && (! early_clobber_p
    1184                 :             :                || check_conflict_input_operands (REGNO (in_rtx), ins))
    1185                 :      407512 :            && (out < 0
    1186                 :      407512 :                || regno_val_use_in (REGNO (in_rtx), out_rtx) == NULL_RTX)
    1187                 :      407472 :            && !out_conflict
    1188                 :     1950862 :            ? lra_create_new_reg (inmode, in_rtx, goal_class,
    1189                 :             :                                  exclude_start_hard_regs, "")
    1190                 :     1135978 :            : lra_create_new_reg_with_unique_value (outmode, out_rtx, goal_class,
    1191                 :             :                                                    exclude_start_hard_regs,
    1192                 :             :                                                    ""));
    1193                 :             :     }
    1194                 :             :   /* In operand can be got from transformations before processing insn
    1195                 :             :      constraints.  One example of such transformations is subreg
    1196                 :             :      reloading (see function simplify_operand_subreg).  The new
    1197                 :             :      pseudos created by the transformations might have inaccurate
    1198                 :             :      class (ALL_REGS) and we should make their classes more
    1199                 :             :      accurate.  */
    1200                 :     1674921 :   narrow_reload_pseudo_class (in_rtx, goal_class);
    1201                 :     1674921 :   lra_emit_move (copy_rtx (new_in_reg), in_rtx);
    1202                 :     1674921 :   *before = get_insns ();
    1203                 :     1674921 :   end_sequence ();
    1204                 :             :   /* Add the new pseudo to consider values of subsequent input reload
    1205                 :             :      pseudos.  */
    1206                 :     1674921 :   lra_assert (curr_insn_input_reloads_num < LRA_MAX_INSN_RELOADS);
    1207                 :     1674921 :   curr_insn_input_reloads[curr_insn_input_reloads_num].input = in_rtx;
    1208                 :     1674921 :   curr_insn_input_reloads[curr_insn_input_reloads_num].match_p = true;
    1209                 :     1674921 :   curr_insn_input_reloads[curr_insn_input_reloads_num].early_clobber_p = false;
    1210                 :     1674921 :   curr_insn_input_reloads[curr_insn_input_reloads_num++].reg = new_in_reg;
    1211                 :     3349843 :   for (i = 0; (in = ins[i]) >= 0; i++)
    1212                 :     1674922 :     if (GET_MODE (*curr_id->operand_loc[in]) == VOIDmode
    1213                 :     1649611 :         || GET_MODE (new_in_reg) == GET_MODE (*curr_id->operand_loc[in]))
    1214                 :     1674921 :       *curr_id->operand_loc[in] = new_in_reg;
    1215                 :             :     else
    1216                 :             :       {
    1217                 :           1 :         lra_assert
    1218                 :             :           (GET_MODE (new_out_reg) == GET_MODE (*curr_id->operand_loc[in]));
    1219                 :           1 :         *curr_id->operand_loc[in] = new_out_reg;
    1220                 :             :       }
    1221                 :     1674921 :   lra_update_dups (curr_id, ins);
    1222                 :     1674921 :   if (out < 0)
    1223                 :             :     return;
    1224                 :             :   /* See a comment for the input operand above.  */
    1225                 :     1674921 :   narrow_reload_pseudo_class (out_rtx, goal_class);
    1226                 :     1674921 :   if (find_reg_note (curr_insn, REG_UNUSED, out_rtx) == NULL_RTX)
    1227                 :             :     {
    1228                 :     1562930 :       reg = SUBREG_P (out_rtx) ? SUBREG_REG (out_rtx) : out_rtx;
    1229                 :     1562930 :       start_sequence ();
    1230                 :             :       /* If we had strict_low_part, use it also in reload to keep other
    1231                 :             :          parts unchanged but do it only for regs as strict_low_part
    1232                 :             :          has no sense for memory and probably there is no insn pattern
    1233                 :             :          to match the reload insn in memory case.  */
    1234                 :     1562930 :       if (out >= 0 && curr_static_id->operand[out].strict_low && REG_P (reg))
    1235                 :           0 :         out_rtx = gen_rtx_STRICT_LOW_PART (VOIDmode, out_rtx);
    1236                 :     1562930 :       lra_emit_move (out_rtx, copy_rtx (new_out_reg));
    1237                 :     1562930 :       emit_insn (*after);
    1238                 :     1562930 :       *after = get_insns ();
    1239                 :     1562930 :       end_sequence ();
    1240                 :             :     }
    1241                 :     1674921 :   *curr_id->operand_loc[out] = new_out_reg;
    1242                 :     1674921 :   lra_update_dup (curr_id, out);
    1243                 :             : }
    1244                 :             : 
    1245                 :             : /* Return register class which is union of all reg classes in insn
    1246                 :             :    constraint alternative string starting with P.  */
    1247                 :             : static enum reg_class
    1248                 :           0 : reg_class_from_constraints (const char *p)
    1249                 :             : {
    1250                 :           0 :   int c, len;
    1251                 :           0 :   enum reg_class op_class = NO_REGS;
    1252                 :             : 
    1253                 :           0 :   do
    1254                 :           0 :     switch ((c = *p, len = CONSTRAINT_LEN (c, p)), c)
    1255                 :             :       {
    1256                 :             :       case '#':
    1257                 :             :       case ',':
    1258                 :             :         return op_class;
    1259                 :             : 
    1260                 :           0 :       case 'g':
    1261                 :           0 :         op_class = reg_class_subunion[op_class][GENERAL_REGS];
    1262                 :           0 :         break;
    1263                 :             : 
    1264                 :           0 :       default:
    1265                 :           0 :         enum constraint_num cn = lookup_constraint (p);
    1266                 :           0 :         enum reg_class cl = reg_class_for_constraint (cn);
    1267                 :           0 :         if (cl == NO_REGS)
    1268                 :             :           {
    1269                 :           0 :             if (insn_extra_address_constraint (cn))
    1270                 :           0 :               op_class
    1271                 :           0 :                 = (reg_class_subunion
    1272                 :           0 :                    [op_class][base_reg_class (VOIDmode, ADDR_SPACE_GENERIC,
    1273                 :           0 :                                               ADDRESS, SCRATCH)]);
    1274                 :             :             break;
    1275                 :             :           }
    1276                 :             : 
    1277                 :           0 :         op_class = reg_class_subunion[op_class][cl];
    1278                 :           0 :         break;
    1279                 :             :       }
    1280                 :           0 :   while ((p += len), c);
    1281                 :             :   return op_class;
    1282                 :             : }
    1283                 :             : 
    1284                 :             : /* If OP is a register, return the class of the register as per
    1285                 :             :    get_reg_class, otherwise return NO_REGS.  */
    1286                 :             : static inline enum reg_class
    1287                 :   156536233 : get_op_class (rtx op)
    1288                 :             : {
    1289                 :   130365491 :   return REG_P (op) ? get_reg_class (REGNO (op)) : NO_REGS;
    1290                 :             : }
    1291                 :             : 
    1292                 :             : /* Return generated insn mem_pseudo:=val if TO_P or val:=mem_pseudo
    1293                 :             :    otherwise.  If modes of MEM_PSEUDO and VAL are different, use
    1294                 :             :    SUBREG for VAL to make them equal.  */
    1295                 :             : static rtx_insn *
    1296                 :     1130626 : emit_spill_move (bool to_p, rtx mem_pseudo, rtx val)
    1297                 :             : {
    1298                 :     1130626 :   if (GET_MODE (mem_pseudo) != GET_MODE (val))
    1299                 :             :     {
    1300                 :             :       /* Usually size of mem_pseudo is greater than val size but in
    1301                 :             :          rare cases it can be less as it can be defined by target
    1302                 :             :          dependent macro HARD_REGNO_CALLER_SAVE_MODE.  */
    1303                 :        2188 :       if (! MEM_P (val))
    1304                 :             :         {
    1305                 :        2188 :           val = gen_lowpart_SUBREG (GET_MODE (mem_pseudo),
    1306                 :             :                                     GET_CODE (val) == SUBREG
    1307                 :             :                                     ? SUBREG_REG (val) : val);
    1308                 :        2188 :           LRA_SUBREG_P (val) = 1;
    1309                 :             :         }
    1310                 :             :       else
    1311                 :             :         {
    1312                 :           0 :           mem_pseudo = gen_lowpart_SUBREG (GET_MODE (val), mem_pseudo);
    1313                 :           0 :           LRA_SUBREG_P (mem_pseudo) = 1;
    1314                 :             :         }
    1315                 :             :     }
    1316                 :     1130626 :   return to_p ? gen_move_insn (mem_pseudo, val)
    1317                 :      571879 :               : gen_move_insn (val, mem_pseudo);
    1318                 :             : }
    1319                 :             : 
    1320                 :             : /* Process a special case insn (register move), return true if we
    1321                 :             :    don't need to process it anymore.  INSN should be a single set
    1322                 :             :    insn.  Set up that RTL was changed through CHANGE_P and that hook
    1323                 :             :    TARGET_SECONDARY_MEMORY_NEEDED says to use secondary memory through
    1324                 :             :    SEC_MEM_P.  */
    1325                 :             : static bool
    1326                 :    72418394 : check_and_process_move (bool *change_p, bool *sec_mem_p ATTRIBUTE_UNUSED)
    1327                 :             : {
    1328                 :    72418394 :   int sregno, dregno;
    1329                 :    72418394 :   rtx dest, src, dreg, sreg, new_reg, scratch_reg;
    1330                 :    72418394 :   rtx_insn *before;
    1331                 :    72418394 :   enum reg_class dclass, sclass, secondary_class;
    1332                 :    72418394 :   secondary_reload_info sri;
    1333                 :             : 
    1334                 :    72418394 :   lra_assert (curr_insn_set != NULL_RTX);
    1335                 :    72418394 :   dreg = dest = SET_DEST (curr_insn_set);
    1336                 :    72418394 :   sreg = src = SET_SRC (curr_insn_set);
    1337                 :    72418394 :   if (GET_CODE (dest) == SUBREG)
    1338                 :     1187857 :     dreg = SUBREG_REG (dest);
    1339                 :    72418394 :   if (GET_CODE (src) == SUBREG)
    1340                 :     1236039 :     sreg = SUBREG_REG (src);
    1341                 :    72418394 :   if (! (REG_P (dreg) || MEM_P (dreg)) || ! (REG_P (sreg) || MEM_P (sreg)))
    1342                 :             :     return false;
    1343                 :    33916875 :   sclass = dclass = NO_REGS;
    1344                 :    33916875 :   if (REG_P (dreg))
    1345                 :    22006287 :     dclass = get_reg_class (REGNO (dreg));
    1346                 :    22006287 :   gcc_assert (dclass < LIM_REG_CLASSES && dclass >= NO_REGS);
    1347                 :    33916875 :   if (dclass == ALL_REGS)
    1348                 :             :     /* ALL_REGS is used for new pseudos created by transformations
    1349                 :             :        like reload of SUBREG_REG (see function
    1350                 :             :        simplify_operand_subreg).  We don't know their class yet.  We
    1351                 :             :        should figure out the class from processing the insn
    1352                 :             :        constraints not in this fast path function.  Even if ALL_REGS
    1353                 :             :        were a right class for the pseudo, secondary_... hooks usually
    1354                 :             :        are not define for ALL_REGS.  */
    1355                 :             :     return false;
    1356                 :    33914950 :   if (REG_P (sreg))
    1357                 :    18730368 :     sclass = get_reg_class (REGNO (sreg));
    1358                 :    18730368 :   gcc_assert (sclass < LIM_REG_CLASSES && sclass >= NO_REGS);
    1359                 :    33914950 :   if (sclass == ALL_REGS)
    1360                 :             :     /* See comments above.  */
    1361                 :             :     return false;
    1362                 :    33914950 :   if (sclass == NO_REGS && dclass == NO_REGS)
    1363                 :             :     return false;
    1364                 :    32482314 :   if (targetm.secondary_memory_needed (GET_MODE (src), sclass, dclass)
    1365                 :    32482314 :       && ((sclass != NO_REGS && dclass != NO_REGS)
    1366                 :           0 :           || (GET_MODE (src)
    1367                 :           0 :               != targetm.secondary_memory_needed_mode (GET_MODE (src)))))
    1368                 :             :     {
    1369                 :       13312 :       *sec_mem_p = true;
    1370                 :       13312 :       return false;
    1371                 :             :     }
    1372                 :    32469002 :   if (! REG_P (dreg) || ! REG_P (sreg))
    1373                 :             :     return false;
    1374                 :     7341420 :   sri.prev_sri = NULL;
    1375                 :     7341420 :   sri.icode = CODE_FOR_nothing;
    1376                 :     7341420 :   sri.extra_cost = 0;
    1377                 :     7341420 :   secondary_class = NO_REGS;
    1378                 :             :   /* Set up hard register for a reload pseudo for hook
    1379                 :             :      secondary_reload because some targets just ignore unassigned
    1380                 :             :      pseudos in the hook.  */
    1381                 :     7341420 :   if (dclass != NO_REGS && lra_get_regno_hard_regno (REGNO (dreg)) < 0)
    1382                 :             :     {
    1383                 :     2804092 :       dregno = REGNO (dreg);
    1384                 :     2804092 :       reg_renumber[dregno] = ira_class_hard_regs[dclass][0];
    1385                 :             :     }
    1386                 :             :   else
    1387                 :             :     dregno = -1;
    1388                 :     7341420 :   if (sclass != NO_REGS && lra_get_regno_hard_regno (REGNO (sreg)) < 0)
    1389                 :             :     {
    1390                 :     1251086 :       sregno = REGNO (sreg);
    1391                 :     1251086 :       reg_renumber[sregno] = ira_class_hard_regs[sclass][0];
    1392                 :             :     }
    1393                 :             :   else
    1394                 :             :     sregno = -1;
    1395                 :     7341420 :   if (sclass != NO_REGS)
    1396                 :     3739788 :     secondary_class
    1397                 :     7479576 :       = (enum reg_class) targetm.secondary_reload (false, dest,
    1398                 :             :                                                    (reg_class_t) sclass,
    1399                 :     3739788 :                                                    GET_MODE (src), &sri);
    1400                 :     3739788 :   if (sclass == NO_REGS
    1401                 :     3739788 :       || ((secondary_class != NO_REGS || sri.icode != CODE_FOR_nothing)
    1402                 :        1304 :           && dclass != NO_REGS))
    1403                 :             :     {
    1404                 :     3601632 :       enum reg_class old_sclass = secondary_class;
    1405                 :     3601632 :       secondary_reload_info old_sri = sri;
    1406                 :             : 
    1407                 :     3601632 :       sri.prev_sri = NULL;
    1408                 :     3601632 :       sri.icode = CODE_FOR_nothing;
    1409                 :     3601632 :       sri.extra_cost = 0;
    1410                 :     3601632 :       secondary_class
    1411                 :     7203264 :         = (enum reg_class) targetm.secondary_reload (true, src,
    1412                 :             :                                                      (reg_class_t) dclass,
    1413                 :     3601632 :                                                      GET_MODE (src), &sri);
    1414                 :             :       /* Check the target hook consistency.  */
    1415                 :     3601632 :       lra_assert
    1416                 :             :         ((secondary_class == NO_REGS && sri.icode == CODE_FOR_nothing)
    1417                 :             :          || (old_sclass == NO_REGS && old_sri.icode == CODE_FOR_nothing)
    1418                 :             :          || (secondary_class == old_sclass && sri.icode == old_sri.icode));
    1419                 :             :     }
    1420                 :     7341420 :   if (sregno >= 0)
    1421                 :     1251086 :     reg_renumber [sregno] = -1;
    1422                 :     7341420 :   if (dregno >= 0)
    1423                 :     2804092 :     reg_renumber [dregno] = -1;
    1424                 :     7341420 :   if (secondary_class == NO_REGS && sri.icode == CODE_FOR_nothing)
    1425                 :             :     return false;
    1426                 :        2484 :   *change_p = true;
    1427                 :        2484 :   new_reg = NULL_RTX;
    1428                 :           0 :   if (secondary_class != NO_REGS)
    1429                 :        2484 :     new_reg = lra_create_new_reg_with_unique_value (GET_MODE (src), NULL_RTX,
    1430                 :             :                                                     secondary_class, NULL,
    1431                 :             :                                                     "secondary");
    1432                 :        2484 :   start_sequence ();
    1433                 :        2484 :   if (sri.icode == CODE_FOR_nothing)
    1434                 :        2484 :     lra_emit_move (new_reg, src);
    1435                 :             :   else
    1436                 :             :     {
    1437                 :           0 :       enum reg_class scratch_class;
    1438                 :             : 
    1439                 :           0 :       scratch_class = (reg_class_from_constraints
    1440                 :           0 :                        (insn_data[sri.icode].operand[2].constraint));
    1441                 :           0 :       scratch_reg = (lra_create_new_reg_with_unique_value
    1442                 :           0 :                      (insn_data[sri.icode].operand[2].mode, NULL_RTX,
    1443                 :             :                       scratch_class, NULL, "scratch"));
    1444                 :           0 :       emit_insn (GEN_FCN (sri.icode) (new_reg != NULL_RTX ? new_reg : dest,
    1445                 :             :                                       src, scratch_reg));
    1446                 :             :     }
    1447                 :        2484 :   before = get_insns ();
    1448                 :        2484 :   end_sequence ();
    1449                 :        2484 :   lra_process_new_insns (curr_insn, before, NULL, "Inserting the move");
    1450                 :        2484 :   if (new_reg != NULL_RTX)
    1451                 :        2484 :     SET_SRC (curr_insn_set) = new_reg;
    1452                 :             :   else
    1453                 :             :     {
    1454                 :           0 :       if (lra_dump_file != NULL)
    1455                 :             :         {
    1456                 :           0 :           fprintf (lra_dump_file, "Deleting move %u\n", INSN_UID (curr_insn));
    1457                 :           0 :           dump_insn_slim (lra_dump_file, curr_insn);
    1458                 :             :         }
    1459                 :           0 :       lra_set_insn_deleted (curr_insn);
    1460                 :           0 :       return true;
    1461                 :             :     }
    1462                 :        2484 :   return false;
    1463                 :             : }
    1464                 :             : 
    1465                 :             : /* The following data describe the result of process_alt_operands.
    1466                 :             :    The data are used in curr_insn_transform to generate reloads.  */
    1467                 :             : 
    1468                 :             : /* The chosen reg classes which should be used for the corresponding
    1469                 :             :    operands.  */
    1470                 :             : static enum reg_class goal_alt[MAX_RECOG_OPERANDS];
    1471                 :             : /* Hard registers which cannot be a start hard register for the corresponding
    1472                 :             :    operands.  */
    1473                 :             : static HARD_REG_SET goal_alt_exclude_start_hard_regs[MAX_RECOG_OPERANDS];
    1474                 :             : /* True if the operand should be the same as another operand and that
    1475                 :             :    other operand does not need a reload.  */
    1476                 :             : static bool goal_alt_match_win[MAX_RECOG_OPERANDS];
    1477                 :             : /* True if the operand does not need a reload.  */
    1478                 :             : static bool goal_alt_win[MAX_RECOG_OPERANDS];
    1479                 :             : /* True if the operand can be offsetable memory.  */
    1480                 :             : static bool goal_alt_offmemok[MAX_RECOG_OPERANDS];
    1481                 :             : /* The number of an operand to which given operand can be matched to.  */
    1482                 :             : static int goal_alt_matches[MAX_RECOG_OPERANDS];
    1483                 :             : /* The number of elements in the following array.  */
    1484                 :             : static int goal_alt_dont_inherit_ops_num;
    1485                 :             : /* Numbers of operands whose reload pseudos should not be inherited.  */
    1486                 :             : static int goal_alt_dont_inherit_ops[MAX_RECOG_OPERANDS];
    1487                 :             : /* True if we should try only this alternative for the next constraint sub-pass
    1488                 :             :    to speed up the sub-pass.  */
    1489                 :             : static bool goal_reuse_alt_p;
    1490                 :             : /* True if the insn commutative operands should be swapped.  */
    1491                 :             : static bool goal_alt_swapped;
    1492                 :             : /* The chosen insn alternative.  */
    1493                 :             : static int goal_alt_number;
    1494                 :             : /* True if output reload of the stack pointer should be generated.  */
    1495                 :             : static bool goal_alt_out_sp_reload_p;
    1496                 :             : 
    1497                 :             : /* True if the corresponding operand is the result of an equivalence
    1498                 :             :    substitution.  */
    1499                 :             : static bool equiv_substition_p[MAX_RECOG_OPERANDS];
    1500                 :             : 
    1501                 :             : /* The following five variables are used to choose the best insn
    1502                 :             :    alternative.  They reflect final characteristics of the best
    1503                 :             :    alternative.  */
    1504                 :             : 
    1505                 :             : /* Number of necessary reloads and overall cost reflecting the
    1506                 :             :    previous value and other unpleasantness of the best alternative.  */
    1507                 :             : static int best_losers, best_overall;
    1508                 :             : /* Overall number hard registers used for reloads.  For example, on
    1509                 :             :    some targets we need 2 general registers to reload DFmode and only
    1510                 :             :    one floating point register.  */
    1511                 :             : static int best_reload_nregs;
    1512                 :             : /* Overall number reflecting distances of previous reloading the same
    1513                 :             :    value.  The distances are counted from the current BB start.  It is
    1514                 :             :    used to improve inheritance chances.  */
    1515                 :             : static int best_reload_sum;
    1516                 :             : 
    1517                 :             : /* True if the current insn should have no correspondingly input or
    1518                 :             :    output reloads.  */
    1519                 :             : static bool no_input_reloads_p, no_output_reloads_p;
    1520                 :             : 
    1521                 :             : /* True if we swapped the commutative operands in the current
    1522                 :             :    insn.  */
    1523                 :             : static int curr_swapped;
    1524                 :             : 
    1525                 :             : /* if CHECK_ONLY_P is false, arrange for address element *LOC to be a
    1526                 :             :    register of class CL.  Add any input reloads to list BEFORE.  AFTER
    1527                 :             :    is nonnull if *LOC is an automodified value; handle that case by
    1528                 :             :    adding the required output reloads to list AFTER.  Return true if
    1529                 :             :    the RTL was changed.
    1530                 :             : 
    1531                 :             :    if CHECK_ONLY_P is true, check that the *LOC is a correct address
    1532                 :             :    register.  Return false if the address register is correct.  */
    1533                 :             : static bool
    1534                 :    33071644 : process_addr_reg (rtx *loc, bool check_only_p, rtx_insn **before, rtx_insn **after,
    1535                 :             :                   enum reg_class cl)
    1536                 :             : {
    1537                 :    33071644 :   int regno;
    1538                 :    33071644 :   enum reg_class rclass, new_class;
    1539                 :    33071644 :   rtx reg;
    1540                 :    33071644 :   rtx new_reg;
    1541                 :    33071644 :   machine_mode mode;
    1542                 :    33071644 :   bool subreg_p, before_p = false;
    1543                 :             : 
    1544                 :    33071644 :   subreg_p = GET_CODE (*loc) == SUBREG;
    1545                 :    33071644 :   if (subreg_p)
    1546                 :             :     {
    1547                 :       13513 :       reg = SUBREG_REG (*loc);
    1548                 :       13513 :       mode = GET_MODE (reg);
    1549                 :             : 
    1550                 :             :       /* For mode with size bigger than ptr_mode, there unlikely to be "mov"
    1551                 :             :          between two registers with different classes, but there normally will
    1552                 :             :          be "mov" which transfers element of vector register into the general
    1553                 :             :          register, and this normally will be a subreg which should be reloaded
    1554                 :             :          as a whole.  This is particularly likely to be triggered when
    1555                 :             :          -fno-split-wide-types specified.  */
    1556                 :       13513 :       if (!REG_P (reg)
    1557                 :       13513 :           || in_class_p (reg, cl, &new_class)
    1558                 :       14895 :           || known_le (GET_MODE_SIZE (mode), GET_MODE_SIZE (ptr_mode)))
    1559                 :       13513 :        loc = &SUBREG_REG (*loc);
    1560                 :             :     }
    1561                 :             : 
    1562                 :    33071644 :   reg = *loc;
    1563                 :    33071644 :   mode = GET_MODE (reg);
    1564                 :    33071644 :   if (! REG_P (reg))
    1565                 :             :     {
    1566                 :           0 :       if (check_only_p)
    1567                 :             :         return true;
    1568                 :             :       /* Always reload memory in an address even if the target supports
    1569                 :             :          such addresses.  */
    1570                 :           0 :       new_reg = lra_create_new_reg_with_unique_value (mode, reg, cl, NULL,
    1571                 :             :                                                       "address");
    1572                 :           0 :       before_p = true;
    1573                 :             :     }
    1574                 :             :   else
    1575                 :             :     {
    1576                 :    33071644 :       regno = REGNO (reg);
    1577                 :    33071644 :       rclass = get_reg_class (regno);
    1578                 :    33071644 :       if (! check_only_p
    1579                 :    33071644 :           && (*loc = get_equiv_with_elimination (reg, curr_insn)) != reg)
    1580                 :             :         {
    1581                 :      105498 :           if (lra_dump_file != NULL)
    1582                 :             :             {
    1583                 :           0 :               fprintf (lra_dump_file,
    1584                 :             :                        "Changing pseudo %d in address of insn %u on equiv ",
    1585                 :           0 :                        REGNO (reg), INSN_UID (curr_insn));
    1586                 :           0 :               dump_value_slim (lra_dump_file, *loc, 1);
    1587                 :           0 :               fprintf (lra_dump_file, "\n");
    1588                 :             :             }
    1589                 :      105498 :           *loc = copy_rtx (*loc);
    1590                 :             :         }
    1591                 :    33071644 :       if (*loc != reg || ! in_class_p (reg, cl, &new_class))
    1592                 :             :         {
    1593                 :      458436 :           if (check_only_p)
    1594                 :             :             return true;
    1595                 :      458436 :           reg = *loc;
    1596                 :      458436 :           if (get_reload_reg (after == NULL ? OP_IN : OP_INOUT,
    1597                 :             :                               mode, reg, cl, NULL,
    1598                 :             :                               subreg_p, false, "address", &new_reg))
    1599                 :             :             before_p = true;
    1600                 :             :         }
    1601                 :    32613208 :       else if (new_class != NO_REGS && rclass != new_class)
    1602                 :             :         {
    1603                 :      446885 :           if (check_only_p)
    1604                 :             :             return true;
    1605                 :      446885 :           lra_change_class (regno, new_class, "       Change to", true);
    1606                 :      446885 :           return false;
    1607                 :             :         }
    1608                 :             :       else
    1609                 :             :         return false;
    1610                 :             :     }
    1611                 :           0 :   if (before_p)
    1612                 :             :     {
    1613                 :      450957 :       push_to_sequence (*before);
    1614                 :      450957 :       lra_emit_move (new_reg, reg);
    1615                 :      450957 :       *before = get_insns ();
    1616                 :      450957 :       end_sequence ();
    1617                 :             :     }
    1618                 :      458436 :   *loc = new_reg;
    1619                 :      458436 :   if (after != NULL)
    1620                 :             :     {
    1621                 :           0 :       start_sequence ();
    1622                 :           0 :       lra_emit_move (before_p ? copy_rtx (reg) : reg, new_reg);
    1623                 :           0 :       emit_insn (*after);
    1624                 :           0 :       *after = get_insns ();
    1625                 :           0 :       end_sequence ();
    1626                 :             :     }
    1627                 :             :   return true;
    1628                 :             : }
    1629                 :             : 
    1630                 :             : /* Insert move insn in simplify_operand_subreg. BEFORE returns
    1631                 :             :    the insn to be inserted before curr insn. AFTER returns the
    1632                 :             :    the insn to be inserted after curr insn.  ORIGREG and NEWREG
    1633                 :             :    are the original reg and new reg for reload.  */
    1634                 :             : static void
    1635                 :         455 : insert_move_for_subreg (rtx_insn **before, rtx_insn **after, rtx origreg,
    1636                 :             :                         rtx newreg)
    1637                 :             : {
    1638                 :         455 :   if (before)
    1639                 :             :     {
    1640                 :         455 :       push_to_sequence (*before);
    1641                 :         455 :       lra_emit_move (newreg, origreg);
    1642                 :         455 :       *before = get_insns ();
    1643                 :         455 :       end_sequence ();
    1644                 :             :     }
    1645                 :         455 :   if (after)
    1646                 :             :     {
    1647                 :           0 :       start_sequence ();
    1648                 :           0 :       lra_emit_move (origreg, newreg);
    1649                 :           0 :       emit_insn (*after);
    1650                 :           0 :       *after = get_insns ();
    1651                 :           0 :       end_sequence ();
    1652                 :             :     }
    1653                 :         455 : }
    1654                 :             : 
    1655                 :             : static bool valid_address_p (machine_mode mode, rtx addr, addr_space_t as);
    1656                 :             : static bool process_address (int, bool, rtx_insn **, rtx_insn **);
    1657                 :             : 
    1658                 :             : /* Make reloads for subreg in operand NOP with internal subreg mode
    1659                 :             :    REG_MODE, add new reloads for further processing.  Return true if
    1660                 :             :    any change was done.  */
    1661                 :             : static bool
    1662                 :   168575988 : simplify_operand_subreg (int nop, machine_mode reg_mode)
    1663                 :             : {
    1664                 :   168575988 :   int hard_regno, inner_hard_regno;
    1665                 :   168575988 :   rtx_insn *before, *after;
    1666                 :   168575988 :   machine_mode mode, innermode;
    1667                 :   168575988 :   rtx reg, new_reg;
    1668                 :   168575988 :   rtx operand = *curr_id->operand_loc[nop];
    1669                 :   168575988 :   enum reg_class regclass;
    1670                 :   168575988 :   enum op_type type;
    1671                 :             : 
    1672                 :   168575988 :   before = after = NULL;
    1673                 :             : 
    1674                 :   168575988 :   if (GET_CODE (operand) != SUBREG)
    1675                 :             :     return false;
    1676                 :             : 
    1677                 :     3670210 :   mode = GET_MODE (operand);
    1678                 :     3670210 :   reg = SUBREG_REG (operand);
    1679                 :     3670210 :   innermode = GET_MODE (reg);
    1680                 :     3670210 :   type = curr_static_id->operand[nop].type;
    1681                 :     3670210 :   if (MEM_P (reg))
    1682                 :             :     {
    1683                 :       10931 :       const bool addr_was_valid
    1684                 :       10931 :         = valid_address_p (innermode, XEXP (reg, 0), MEM_ADDR_SPACE (reg));
    1685                 :       10931 :       alter_subreg (curr_id->operand_loc[nop], false);
    1686                 :       10931 :       rtx subst = *curr_id->operand_loc[nop];
    1687                 :       10931 :       lra_assert (MEM_P (subst));
    1688                 :       10931 :       const bool addr_is_valid = valid_address_p (GET_MODE (subst),
    1689                 :             :                                                   XEXP (subst, 0),
    1690                 :       10931 :                                                   MEM_ADDR_SPACE (subst));
    1691                 :       10931 :       if (!addr_was_valid
    1692                 :       10931 :           || addr_is_valid
    1693                 :       10931 :           || ((get_constraint_type (lookup_constraint
    1694                 :           0 :                                     (curr_static_id->operand[nop].constraint))
    1695                 :             :                != CT_SPECIAL_MEMORY)
    1696                 :             :               /* We still can reload address and if the address is
    1697                 :             :                  valid, we can remove subreg without reloading its
    1698                 :             :                  inner memory.  */
    1699                 :           0 :               && valid_address_p (GET_MODE (subst),
    1700                 :           0 :                                   regno_reg_rtx
    1701                 :             :                                   [ira_class_hard_regs
    1702                 :           0 :                                    [base_reg_class (GET_MODE (subst),
    1703                 :           0 :                                                     MEM_ADDR_SPACE (subst),
    1704                 :           0 :                                                     ADDRESS, SCRATCH)][0]],
    1705                 :           0 :                                   MEM_ADDR_SPACE (subst))))
    1706                 :             :         {
    1707                 :             :           /* If we change the address for a paradoxical subreg of memory, the
    1708                 :             :              new address might violate the necessary alignment or the access
    1709                 :             :              might be slow; take this into consideration.  We need not worry
    1710                 :             :              about accesses beyond allocated memory for paradoxical memory
    1711                 :             :              subregs as we don't substitute such equiv memory (see processing
    1712                 :             :              equivalences in function lra_constraints) and because for spilled
    1713                 :             :              pseudos we allocate stack memory enough for the biggest
    1714                 :             :              corresponding paradoxical subreg.
    1715                 :             : 
    1716                 :             :              However, do not blindly simplify a (subreg (mem ...)) for
    1717                 :             :              WORD_REGISTER_OPERATIONS targets as this may lead to loading junk
    1718                 :             :              data into a register when the inner is narrower than outer or
    1719                 :             :              missing important data from memory when the inner is wider than
    1720                 :             :              outer.  This rule only applies to modes that are no wider than
    1721                 :             :              a word.
    1722                 :             : 
    1723                 :             :              If valid memory becomes invalid after subreg elimination
    1724                 :             :              and address might be different we still have to reload
    1725                 :             :              memory.
    1726                 :             :           */
    1727                 :       10931 :           if ((! addr_was_valid
    1728                 :             :                || addr_is_valid
    1729                 :           0 :                || known_eq (GET_MODE_SIZE (mode), GET_MODE_SIZE (innermode)))
    1730                 :       10931 :               && !(maybe_ne (GET_MODE_PRECISION (mode),
    1731                 :       10931 :                              GET_MODE_PRECISION (innermode))
    1732                 :       13787 :                    && known_le (GET_MODE_SIZE (mode), UNITS_PER_WORD)
    1733                 :       19476 :                    && known_le (GET_MODE_SIZE (innermode), UNITS_PER_WORD)
    1734                 :             :                    && WORD_REGISTER_OPERATIONS)
    1735                 :       23067 :               && (!(MEM_ALIGN (subst) < GET_MODE_ALIGNMENT (mode)
    1736                 :        1205 :                     && targetm.slow_unaligned_access (mode, MEM_ALIGN (subst)))
    1737                 :           0 :                   || (MEM_ALIGN (reg) < GET_MODE_ALIGNMENT (innermode)
    1738                 :           0 :                       && targetm.slow_unaligned_access (innermode,
    1739                 :           0 :                                                         MEM_ALIGN (reg)))))
    1740                 :       10931 :             return true;
    1741                 :             : 
    1742                 :           0 :           *curr_id->operand_loc[nop] = operand;
    1743                 :             : 
    1744                 :             :           /* But if the address was not valid, we cannot reload the MEM without
    1745                 :             :              reloading the address first.  */
    1746                 :           0 :           if (!addr_was_valid)
    1747                 :             :             process_address (nop, false, &before, &after);
    1748                 :             : 
    1749                 :             :           /* INNERMODE is fast, MODE slow.  Reload the mem in INNERMODE.  */
    1750                 :           0 :           enum reg_class rclass
    1751                 :           0 :             = (enum reg_class) targetm.preferred_reload_class (reg, ALL_REGS);
    1752                 :           0 :           if (get_reload_reg (curr_static_id->operand[nop].type, innermode,
    1753                 :             :                               reg, rclass, NULL,
    1754                 :             :                               true, false, "slow/invalid mem", &new_reg))
    1755                 :             :             {
    1756                 :           0 :               bool insert_before, insert_after;
    1757                 :           0 :               bitmap_set_bit (&lra_subreg_reload_pseudos, REGNO (new_reg));
    1758                 :             : 
    1759                 :           0 :               insert_before = (type != OP_OUT
    1760                 :           0 :                                || partial_subreg_p (mode, innermode));
    1761                 :           0 :               insert_after = type != OP_IN;
    1762                 :           0 :               insert_move_for_subreg (insert_before ? &before : NULL,
    1763                 :             :                                       insert_after ? &after : NULL,
    1764                 :             :                                       reg, new_reg);
    1765                 :             :             }
    1766                 :           0 :           SUBREG_REG (operand) = new_reg;
    1767                 :             : 
    1768                 :             :           /* Convert to MODE.  */
    1769                 :           0 :           reg = operand;
    1770                 :           0 :           rclass
    1771                 :           0 :             = (enum reg_class) targetm.preferred_reload_class (reg, ALL_REGS);
    1772                 :           0 :           if (get_reload_reg (curr_static_id->operand[nop].type, mode, reg,
    1773                 :             :                               rclass, NULL,
    1774                 :             :                               true, false, "slow/invalid mem", &new_reg))
    1775                 :             :             {
    1776                 :           0 :               bool insert_before, insert_after;
    1777                 :           0 :               bitmap_set_bit (&lra_subreg_reload_pseudos, REGNO (new_reg));
    1778                 :             : 
    1779                 :           0 :               insert_before = type != OP_OUT;
    1780                 :           0 :               insert_after = type != OP_IN;
    1781                 :           0 :               insert_move_for_subreg (insert_before ? &before : NULL,
    1782                 :             :                                       insert_after ? &after : NULL,
    1783                 :             :                                       reg, new_reg);
    1784                 :             :             }
    1785                 :           0 :           *curr_id->operand_loc[nop] = new_reg;
    1786                 :           0 :           lra_process_new_insns (curr_insn, before, after,
    1787                 :             :                                  "Inserting slow/invalid mem reload");
    1788                 :           0 :           return true;
    1789                 :             :         }
    1790                 :             : 
    1791                 :             :       /* If the address was valid and became invalid, prefer to reload
    1792                 :             :          the memory.  Typical case is when the index scale should
    1793                 :             :          correspond the memory.  */
    1794                 :           0 :       *curr_id->operand_loc[nop] = operand;
    1795                 :             :       /* Do not return false here as the MEM_P (reg) will be processed
    1796                 :             :          later in this function.  */
    1797                 :             :     }
    1798                 :     3659279 :   else if (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER)
    1799                 :             :     {
    1800                 :          82 :       alter_subreg (curr_id->operand_loc[nop], false);
    1801                 :          82 :       return true;
    1802                 :             :     }
    1803                 :     3659197 :   else if (CONSTANT_P (reg))
    1804                 :             :     {
    1805                 :             :       /* Try to simplify subreg of constant.  It is usually result of
    1806                 :             :          equivalence substitution.  */
    1807                 :         829 :       if (innermode == VOIDmode
    1808                 :         829 :           && (innermode = original_subreg_reg_mode[nop]) == VOIDmode)
    1809                 :           0 :         innermode = curr_static_id->operand[nop].mode;
    1810                 :         829 :       if ((new_reg = simplify_subreg (mode, reg, innermode,
    1811                 :         829 :                                       SUBREG_BYTE (operand))) != NULL_RTX)
    1812                 :             :         {
    1813                 :         416 :           *curr_id->operand_loc[nop] = new_reg;
    1814                 :         416 :           return true;
    1815                 :             :         }
    1816                 :             :     }
    1817                 :             :   /* Put constant into memory when we have mixed modes.  It generates
    1818                 :             :      a better code in most cases as it does not need a secondary
    1819                 :             :      reload memory.  It also prevents LRA looping when LRA is using
    1820                 :             :      secondary reload memory again and again.  */
    1821                 :         826 :   if (CONSTANT_P (reg) && CONST_POOL_OK_P (reg_mode, reg)
    1822                 :     3659194 :       && SCALAR_INT_MODE_P (reg_mode) != SCALAR_INT_MODE_P (mode))
    1823                 :             :     {
    1824                 :           8 :       SUBREG_REG (operand) = force_const_mem (reg_mode, reg);
    1825                 :           8 :       alter_subreg (curr_id->operand_loc[nop], false);
    1826                 :           8 :       return true;
    1827                 :             :     }
    1828                 :     3658773 :   auto fp_subreg_can_be_simplified_after_reload_p = [] (machine_mode innermode,
    1829                 :             :                                                         poly_uint64 offset,
    1830                 :             :                                                         machine_mode mode) {
    1831                 :           0 :     reload_completed = 1;
    1832                 :           0 :     bool res = simplify_subreg_regno (FRAME_POINTER_REGNUM,
    1833                 :             :                                       innermode,
    1834                 :           0 :                                       offset, mode) >= 0;
    1835                 :           0 :     reload_completed = 0;
    1836                 :           0 :     return res;
    1837                 :             :   };
    1838                 :             :   /* Force a reload of the SUBREG_REG if this is a constant or PLUS or
    1839                 :             :      if there may be a problem accessing OPERAND in the outer
    1840                 :             :      mode.  */
    1841                 :     3658773 :   if ((REG_P (reg)
    1842                 :     3658317 :        && REGNO (reg) >= FIRST_PSEUDO_REGISTER
    1843                 :     3658317 :        && (hard_regno = lra_get_regno_hard_regno (REGNO (reg))) >= 0
    1844                 :             :        /* Don't reload paradoxical subregs because we could be looping
    1845                 :             :           having repeatedly final regno out of hard regs range.  */
    1846                 :     3101822 :        && (hard_regno_nregs (hard_regno, innermode)
    1847                 :     3101822 :            >= hard_regno_nregs (hard_regno, mode))
    1848                 :     3096405 :        && simplify_subreg_regno (hard_regno, innermode,
    1849                 :     3096405 :                                  SUBREG_BYTE (operand), mode) < 0
    1850                 :             :        /* Exclude reloading of frame pointer in subreg if frame pointer can not
    1851                 :             :           be simplified here only because the reload is not finished yet.  */
    1852                 :         619 :        && (hard_regno != FRAME_POINTER_REGNUM
    1853                 :           0 :            || !fp_subreg_can_be_simplified_after_reload_p (innermode,
    1854                 :           0 :                                                            SUBREG_BYTE (operand),
    1855                 :             :                                                            mode))
    1856                 :             :        /* Don't reload subreg for matching reload.  It is actually
    1857                 :             :           valid subreg in LRA.  */
    1858                 :         619 :        && ! LRA_SUBREG_P (operand))
    1859                 :     7317090 :       || CONSTANT_P (reg) || GET_CODE (reg) == PLUS || MEM_P (reg))
    1860                 :             :     {
    1861                 :         455 :       enum reg_class rclass;
    1862                 :             : 
    1863                 :         455 :       if (REG_P (reg))
    1864                 :             :         /* There is a big probability that we will get the same class
    1865                 :             :            for the new pseudo and we will get the same insn which
    1866                 :             :            means infinite looping.  So spill the new pseudo.  */
    1867                 :             :         rclass = NO_REGS;
    1868                 :             :       else
    1869                 :             :         /* The class will be defined later in curr_insn_transform.  */
    1870                 :         455 :         rclass
    1871                 :         455 :           = (enum reg_class) targetm.preferred_reload_class (reg, ALL_REGS);
    1872                 :             : 
    1873                 :         455 :       if (get_reload_reg (curr_static_id->operand[nop].type, reg_mode, reg,
    1874                 :             :                           rclass, NULL,
    1875                 :             :                           true, false, "subreg reg", &new_reg))
    1876                 :             :         {
    1877                 :         455 :           bool insert_before, insert_after;
    1878                 :         455 :           bitmap_set_bit (&lra_subreg_reload_pseudos, REGNO (new_reg));
    1879                 :             : 
    1880                 :         910 :           insert_before = (type != OP_OUT
    1881                 :         455 :                            || read_modify_subreg_p (operand));
    1882                 :         455 :           insert_after = (type != OP_IN);
    1883                 :         910 :           insert_move_for_subreg (insert_before ? &before : NULL,
    1884                 :             :                                   insert_after ? &after : NULL,
    1885                 :             :                                   reg, new_reg);
    1886                 :             :         }
    1887                 :         455 :       SUBREG_REG (operand) = new_reg;
    1888                 :         455 :       lra_process_new_insns (curr_insn, before, after,
    1889                 :             :                              "Inserting subreg reload");
    1890                 :         455 :       return true;
    1891                 :             :     }
    1892                 :             :   /* Force a reload for a paradoxical subreg. For paradoxical subreg,
    1893                 :             :      IRA allocates hardreg to the inner pseudo reg according to its mode
    1894                 :             :      instead of the outermode, so the size of the hardreg may not be enough
    1895                 :             :      to contain the outermode operand, in that case we may need to insert
    1896                 :             :      reload for the reg. For the following two types of paradoxical subreg,
    1897                 :             :      we need to insert reload:
    1898                 :             :      1. If the op_type is OP_IN, and the hardreg could not be paired with
    1899                 :             :         other hardreg to contain the outermode operand
    1900                 :             :         (checked by in_hard_reg_set_p), we need to insert the reload.
    1901                 :             :      2. If the op_type is OP_OUT or OP_INOUT.
    1902                 :             : 
    1903                 :             :      Here is a paradoxical subreg example showing how the reload is generated:
    1904                 :             : 
    1905                 :             :      (insn 5 4 7 2 (set (reg:TI 106 [ __comp ])
    1906                 :             :         (subreg:TI (reg:DI 107 [ __comp ]) 0)) {*movti_internal_rex64}
    1907                 :             : 
    1908                 :             :      In IRA, reg107 is allocated to a DImode hardreg. We use x86-64 as example
    1909                 :             :      here, if reg107 is assigned to hardreg R15, because R15 is the last
    1910                 :             :      hardreg, compiler cannot find another hardreg to pair with R15 to
    1911                 :             :      contain TImode data. So we insert a TImode reload reg180 for it.
    1912                 :             :      After reload is inserted:
    1913                 :             : 
    1914                 :             :      (insn 283 0 0 (set (subreg:DI (reg:TI 180 [orig:107 __comp ] [107]) 0)
    1915                 :             :         (reg:DI 107 [ __comp ])) -1
    1916                 :             :      (insn 5 4 7 2 (set (reg:TI 106 [ __comp ])
    1917                 :             :         (subreg:TI (reg:TI 180 [orig:107 __comp ] [107]) 0)) {*movti_internal_rex64}
    1918                 :             : 
    1919                 :             :      Two reload hard registers will be allocated to reg180 to save TImode data
    1920                 :             :      in LRA_assign.
    1921                 :             : 
    1922                 :             :      For LRA pseudos this should normally be handled by the biggest_mode
    1923                 :             :      mechanism.  However, it's possible for new uses of an LRA pseudo
    1924                 :             :      to be introduced after we've allocated it, such as when undoing
    1925                 :             :      inheritance, and the allocated register might not then be appropriate
    1926                 :             :      for the new uses.  */
    1927                 :     3658318 :   else if (REG_P (reg)
    1928                 :     3658317 :            && REGNO (reg) >= FIRST_PSEUDO_REGISTER
    1929                 :     3658317 :            && paradoxical_subreg_p (operand)
    1930                 :     1057052 :            && (inner_hard_regno = lra_get_regno_hard_regno (REGNO (reg))) >= 0
    1931                 :     3658318 :            && ((hard_regno
    1932                 :     4626710 :                 = simplify_subreg_regno (inner_hard_regno, innermode,
    1933                 :      968392 :                                          SUBREG_BYTE (operand), mode)) < 0
    1934                 :      968392 :                || ((hard_regno_nregs (inner_hard_regno, innermode)
    1935                 :      968392 :                     < hard_regno_nregs (hard_regno, mode))
    1936                 :       10834 :                    && (regclass = lra_get_allocno_class (REGNO (reg)))
    1937                 :        5417 :                    && (type != OP_IN
    1938                 :        5417 :                        || !in_hard_reg_set_p (reg_class_contents[regclass],
    1939                 :             :                                               mode, hard_regno)
    1940                 :        5417 :                        || overlaps_hard_reg_set_p (lra_no_alloc_regs,
    1941                 :             :                                                    mode, hard_regno)))))
    1942                 :             :     {
    1943                 :             :       /* The class will be defined later in curr_insn_transform.  */
    1944                 :           0 :       enum reg_class rclass
    1945                 :           0 :         = (enum reg_class) targetm.preferred_reload_class (reg, ALL_REGS);
    1946                 :             : 
    1947                 :           0 :       if (get_reload_reg (curr_static_id->operand[nop].type, mode, reg,
    1948                 :             :                           rclass, NULL,
    1949                 :             :                           true, false, "paradoxical subreg", &new_reg))
    1950                 :             :         {
    1951                 :           0 :           rtx subreg;
    1952                 :           0 :           bool insert_before, insert_after;
    1953                 :             : 
    1954                 :           0 :           PUT_MODE (new_reg, mode);
    1955                 :           0 :           subreg = gen_lowpart_SUBREG (innermode, new_reg);
    1956                 :           0 :           bitmap_set_bit (&lra_subreg_reload_pseudos, REGNO (new_reg));
    1957                 :             : 
    1958                 :           0 :           insert_before = (type != OP_OUT);
    1959                 :           0 :           insert_after = (type != OP_IN);
    1960                 :           0 :           insert_move_for_subreg (insert_before ? &before : NULL,
    1961                 :             :                                   insert_after ? &after : NULL,
    1962                 :             :                                   reg, subreg);
    1963                 :             :         }
    1964                 :           0 :       SUBREG_REG (operand) = new_reg;
    1965                 :           0 :       lra_process_new_insns (curr_insn, before, after,
    1966                 :             :                              "Inserting paradoxical subreg reload");
    1967                 :           0 :       return true;
    1968                 :             :     }
    1969                 :             :   return false;
    1970                 :             : }
    1971                 :             : 
    1972                 :             : /* Return TRUE if X refers for a hard register from SET.  */
    1973                 :             : static bool
    1974                 :      427446 : uses_hard_regs_p (rtx x, HARD_REG_SET set)
    1975                 :             : {
    1976                 :      427446 :   int i, j, x_hard_regno;
    1977                 :      427446 :   machine_mode mode;
    1978                 :      427446 :   const char *fmt;
    1979                 :      427446 :   enum rtx_code code;
    1980                 :             : 
    1981                 :      427446 :   if (x == NULL_RTX)
    1982                 :             :     return false;
    1983                 :      427446 :   code = GET_CODE (x);
    1984                 :      427446 :   mode = GET_MODE (x);
    1985                 :             : 
    1986                 :      427446 :   if (code == SUBREG)
    1987                 :             :     {
    1988                 :             :       /* For all SUBREGs we want to check whether the full multi-register
    1989                 :             :          overlaps the set.  For normal SUBREGs this means 'get_hard_regno' of
    1990                 :             :          the inner register, for paradoxical SUBREGs this means the
    1991                 :             :          'get_hard_regno' of the full SUBREG and for complete SUBREGs either is
    1992                 :             :          fine.  Use the wider mode for all cases.  */
    1993                 :        3236 :       rtx subreg = SUBREG_REG (x);
    1994                 :        3236 :       mode = wider_subreg_mode (x);
    1995                 :        3236 :       if (mode == GET_MODE (subreg))
    1996                 :             :         {
    1997                 :        2248 :           x = subreg;
    1998                 :        2248 :           code = GET_CODE (x);
    1999                 :             :         }
    2000                 :             :     }
    2001                 :             : 
    2002                 :      427446 :   if (REG_P (x) || SUBREG_P (x))
    2003                 :             :     {
    2004                 :      265806 :       x_hard_regno = get_hard_regno (x);
    2005                 :      265806 :       return (x_hard_regno >= 0
    2006                 :      265806 :               && overlaps_hard_reg_set_p (set, mode, x_hard_regno));
    2007                 :             :     }
    2008                 :      161640 :   fmt = GET_RTX_FORMAT (code);
    2009                 :      419293 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
    2010                 :             :     {
    2011                 :      259865 :       if (fmt[i] == 'e')
    2012                 :             :         {
    2013                 :      127580 :           if (uses_hard_regs_p (XEXP (x, i), set))
    2014                 :             :             return true;
    2015                 :             :         }
    2016                 :      132285 :       else if (fmt[i] == 'E')
    2017                 :             :         {
    2018                 :        4958 :           for (j = XVECLEN (x, i) - 1; j >= 0; j--)
    2019                 :        4500 :             if (uses_hard_regs_p (XVECEXP (x, i, j), set))
    2020                 :             :               return true;
    2021                 :             :         }
    2022                 :             :     }
    2023                 :             :   return false;
    2024                 :             : }
    2025                 :             : 
    2026                 :             : /* Return true if OP is a spilled pseudo. */
    2027                 :             : static inline bool
    2028                 :    78056641 : spilled_pseudo_p (rtx op)
    2029                 :             : {
    2030                 :    78056641 :   return (REG_P (op)
    2031                 :    78056641 :           && REGNO (op) >= FIRST_PSEUDO_REGISTER && in_mem_p (REGNO (op)));
    2032                 :             : }
    2033                 :             : 
    2034                 :             : /* Return true if X is a general constant.  */
    2035                 :             : static inline bool
    2036                 :     7561968 : general_constant_p (rtx x)
    2037                 :             : {
    2038                 :     7561968 :   return CONSTANT_P (x) && (! flag_pic || LEGITIMATE_PIC_OPERAND_P (x));
    2039                 :             : }
    2040                 :             : 
    2041                 :             : static bool
    2042                 :    24004273 : reg_in_class_p (rtx reg, enum reg_class cl)
    2043                 :             : {
    2044                 :    24004273 :   if (cl == NO_REGS)
    2045                 :     1118557 :     return get_reg_class (REGNO (reg)) == NO_REGS;
    2046                 :    22885716 :   return in_class_p (reg, cl, NULL);
    2047                 :             : }
    2048                 :             : 
    2049                 :             : /* Return true if SET of RCLASS contains no hard regs which can be
    2050                 :             :    used in MODE.  */
    2051                 :             : static bool
    2052                 :     3648993 : prohibited_class_reg_set_mode_p (enum reg_class rclass,
    2053                 :             :                                  HARD_REG_SET &set,
    2054                 :             :                                  machine_mode mode)
    2055                 :             : {
    2056                 :     3648993 :   HARD_REG_SET temp;
    2057                 :             : 
    2058                 :     7297986 :   lra_assert (hard_reg_set_subset_p (reg_class_contents[rclass], set));
    2059                 :     3648993 :   temp = set & ~lra_no_alloc_regs;
    2060                 :     3648993 :   return (hard_reg_set_subset_p
    2061                 :     3648993 :           (temp, ira_prohibited_class_mode_regs[rclass][mode]));
    2062                 :             : }
    2063                 :             : 
    2064                 :             : 
    2065                 :             : /* Used to check validity info about small class input operands.  It
    2066                 :             :    should be incremented at start of processing an insn
    2067                 :             :    alternative.  */
    2068                 :             : static unsigned int curr_small_class_check = 0;
    2069                 :             : 
    2070                 :             : /* Update number of used inputs of class OP_CLASS for operand NOP
    2071                 :             :    of alternative NALT.  Return true if we have more such class operands
    2072                 :             :    than the number of available regs.  */
    2073                 :             : static bool
    2074                 :   378107608 : update_and_check_small_class_inputs (int nop, int nalt,
    2075                 :             :                                      enum reg_class op_class)
    2076                 :             : {
    2077                 :   378107608 :   static unsigned int small_class_check[LIM_REG_CLASSES];
    2078                 :   378107608 :   static int small_class_input_nums[LIM_REG_CLASSES];
    2079                 :             : 
    2080                 :   375086294 :   if (SMALL_REGISTER_CLASS_P (op_class)
    2081                 :             :       /* We are interesting in classes became small because of fixing
    2082                 :             :          some hard regs, e.g. by an user through GCC options.  */
    2083                 :     3129018 :       && hard_reg_set_intersect_p (reg_class_contents[op_class],
    2084                 :     3129018 :                                    ira_no_alloc_regs)
    2085                 :   378107646 :       && (curr_static_id->operand[nop].type != OP_OUT
    2086                 :          32 :           || TEST_BIT (curr_static_id->operand[nop].early_clobber_alts, nalt)))
    2087                 :             :     {
    2088                 :           6 :       if (small_class_check[op_class] == curr_small_class_check)
    2089                 :           0 :         small_class_input_nums[op_class]++;
    2090                 :             :       else
    2091                 :             :         {
    2092                 :           6 :           small_class_check[op_class] = curr_small_class_check;
    2093                 :           6 :           small_class_input_nums[op_class] = 1;
    2094                 :             :         }
    2095                 :           6 :       if (small_class_input_nums[op_class] > ira_class_hard_regs_num[op_class])
    2096                 :             :         return true;
    2097                 :             :     }
    2098                 :             :   return false;
    2099                 :             : }
    2100                 :             : 
    2101                 :             : /* Print operand constraints for alternative ALT_NUMBER of the current
    2102                 :             :    insn.  */
    2103                 :             : static void
    2104                 :        4675 : print_curr_insn_alt (int alt_number)
    2105                 :             : {
    2106                 :       16254 :   for (int i = 0; i < curr_static_id->n_operands; i++)
    2107                 :             :     {
    2108                 :       11579 :       const char *p = (curr_static_id->operand_alternative
    2109                 :       11579 :                        [alt_number * curr_static_id->n_operands + i].constraint);
    2110                 :       11579 :       if (*p == '\0')
    2111                 :         214 :         continue;
    2112                 :       11365 :       fprintf (lra_dump_file, "  (%d) ", i);
    2113                 :       40306 :       for (; *p != '\0' && *p != ',' && *p != '#'; p++)
    2114                 :       17576 :         fputc (*p, lra_dump_file);
    2115                 :             :     }
    2116                 :        4675 : }
    2117                 :             : 
    2118                 :             : /* Major function to choose the current insn alternative and what
    2119                 :             :    operands should be reloaded and how.  If ONLY_ALTERNATIVE is not
    2120                 :             :    negative we should consider only this alternative.  Return false if
    2121                 :             :    we cannot choose the alternative or find how to reload the
    2122                 :             :    operands.  */
    2123                 :             : static bool
    2124                 :    86222893 : process_alt_operands (int only_alternative)
    2125                 :             : {
    2126                 :    86222893 :   bool ok_p = false;
    2127                 :    86222893 :   int nop, overall, nalt;
    2128                 :    86222893 :   int n_alternatives = curr_static_id->n_alternatives;
    2129                 :    86222893 :   int n_operands = curr_static_id->n_operands;
    2130                 :             :   /* LOSERS counts the operands that don't fit this alternative and
    2131                 :             :      would require loading.  */
    2132                 :    86222893 :   int losers;
    2133                 :    86222893 :   int addr_losers;
    2134                 :             :   /* REJECT is a count of how undesirable this alternative says it is
    2135                 :             :      if any reloading is required.  If the alternative matches exactly
    2136                 :             :      then REJECT is ignored, but otherwise it gets this much counted
    2137                 :             :      against it in addition to the reloading needed.  */
    2138                 :    86222893 :   int reject;
    2139                 :             :   /* This is defined by '!' or '?' alternative constraint and added to
    2140                 :             :      reject.  But in some cases it can be ignored.  */
    2141                 :    86222893 :   int static_reject;
    2142                 :    86222893 :   int op_reject;
    2143                 :             :   /* The number of elements in the following array.  */
    2144                 :    86222893 :   int early_clobbered_regs_num;
    2145                 :             :   /* Numbers of operands which are early clobber registers.  */
    2146                 :    86222893 :   int early_clobbered_nops[MAX_RECOG_OPERANDS];
    2147                 :    86222893 :   enum reg_class curr_alt[MAX_RECOG_OPERANDS];
    2148                 :    86222893 :   enum reg_class all_this_alternative;
    2149                 :    86222893 :   int all_used_nregs, all_reload_nregs;
    2150                 :    86222893 :   HARD_REG_SET curr_alt_set[MAX_RECOG_OPERANDS];
    2151                 :    86222893 :   HARD_REG_SET curr_alt_exclude_start_hard_regs[MAX_RECOG_OPERANDS];
    2152                 :    86222893 :   bool curr_alt_match_win[MAX_RECOG_OPERANDS];
    2153                 :    86222893 :   bool curr_alt_win[MAX_RECOG_OPERANDS];
    2154                 :    86222893 :   bool curr_alt_offmemok[MAX_RECOG_OPERANDS];
    2155                 :    86222893 :   int curr_alt_matches[MAX_RECOG_OPERANDS];
    2156                 :             :   /* The number of elements in the following array.  */
    2157                 :    86222893 :   int curr_alt_dont_inherit_ops_num;
    2158                 :             :   /* Numbers of operands whose reload pseudos should not be inherited.  */
    2159                 :    86222893 :   int curr_alt_dont_inherit_ops[MAX_RECOG_OPERANDS];
    2160                 :    86222893 :   bool curr_reuse_alt_p;
    2161                 :             :   /* True if output stack pointer reload should be generated for the current
    2162                 :             :      alternative.  */
    2163                 :    86222893 :   bool curr_alt_out_sp_reload_p;
    2164                 :    86222893 :   bool curr_alt_class_change_p;
    2165                 :    86222893 :   rtx op;
    2166                 :             :   /* The register when the operand is a subreg of register, otherwise the
    2167                 :             :      operand itself.  */
    2168                 :    86222893 :   rtx no_subreg_reg_operand[MAX_RECOG_OPERANDS];
    2169                 :             :   /* The register if the operand is a register or subreg of register,
    2170                 :             :      otherwise NULL.  */
    2171                 :    86222893 :   rtx operand_reg[MAX_RECOG_OPERANDS];
    2172                 :    86222893 :   int hard_regno[MAX_RECOG_OPERANDS];
    2173                 :    86222893 :   machine_mode biggest_mode[MAX_RECOG_OPERANDS];
    2174                 :    86222893 :   int reload_nregs, reload_sum;
    2175                 :    86222893 :   bool costly_p;
    2176                 :    86222893 :   enum reg_class cl;
    2177                 :    86222893 :   const HARD_REG_SET *cl_filter;
    2178                 :             : 
    2179                 :             :   /* Calculate some data common for all alternatives to speed up the
    2180                 :             :      function.  */
    2181                 :   287027667 :   for (nop = 0; nop < n_operands; nop++)
    2182                 :             :     {
    2183                 :   200804774 :       rtx reg;
    2184                 :             : 
    2185                 :   200804774 :       op = no_subreg_reg_operand[nop] = *curr_id->operand_loc[nop];
    2186                 :             :       /* The real hard regno of the operand after the allocation.  */
    2187                 :   200804774 :       hard_regno[nop] = get_hard_regno (op);
    2188                 :             : 
    2189                 :   200804774 :       operand_reg[nop] = reg = op;
    2190                 :   200804774 :       biggest_mode[nop] = GET_MODE (op);
    2191                 :   200804774 :       if (GET_CODE (op) == SUBREG)
    2192                 :             :         {
    2193                 :     4199127 :           biggest_mode[nop] = wider_subreg_mode (op);
    2194                 :     4199127 :           operand_reg[nop] = reg = SUBREG_REG (op);
    2195                 :             :         }
    2196                 :   200804774 :       if (! REG_P (reg))
    2197                 :    84754284 :         operand_reg[nop] = NULL_RTX;
    2198                 :   116050490 :       else if (REGNO (reg) >= FIRST_PSEUDO_REGISTER
    2199                 :   136680765 :                || ((int) REGNO (reg)
    2200                 :    20630275 :                    == lra_get_elimination_hard_regno (REGNO (reg))))
    2201                 :   113141564 :         no_subreg_reg_operand[nop] = reg;
    2202                 :             :       else
    2203                 :     2908926 :         operand_reg[nop] = no_subreg_reg_operand[nop]
    2204                 :             :           /* Just use natural mode for elimination result.  It should
    2205                 :             :              be enough for extra constraints hooks.  */
    2206                 :     2908926 :           = regno_reg_rtx[hard_regno[nop]];
    2207                 :             :     }
    2208                 :             : 
    2209                 :             :   /* The constraints are made of several alternatives.  Each operand's
    2210                 :             :      constraint looks like foo,bar,... with commas separating the
    2211                 :             :      alternatives.  The first alternatives for all operands go
    2212                 :             :      together, the second alternatives go together, etc.
    2213                 :             : 
    2214                 :             :      First loop over alternatives.  */
    2215                 :    86222893 :   alternative_mask preferred = curr_id->preferred_alternatives;
    2216                 :    86222893 :   if (only_alternative >= 0)
    2217                 :      932934 :     preferred &= ALTERNATIVE_BIT (only_alternative);
    2218                 :             : 
    2219                 :   355253266 :   for (nalt = 0; nalt < n_alternatives; nalt++)
    2220                 :             :     {
    2221                 :             :       /* Loop over operands for one constraint alternative.  */
    2222                 :   341961869 :       if (!TEST_BIT (preferred, nalt))
    2223                 :    95048680 :         continue;
    2224                 :             : 
    2225                 :   246913189 :       if (lra_dump_file != NULL)
    2226                 :             :         {
    2227                 :        3475 :           fprintf (lra_dump_file, "         Considering alt=%d of insn %d: ",
    2228                 :        3475 :                    nalt, INSN_UID (curr_insn));
    2229                 :        3475 :           print_curr_insn_alt (nalt);
    2230                 :        3475 :           fprintf (lra_dump_file, "\n");
    2231                 :             :         }
    2232                 :             : 
    2233                 :   246913189 :       bool matching_early_clobber[MAX_RECOG_OPERANDS];
    2234                 :   246913189 :       curr_small_class_check++;
    2235                 :   246913189 :       overall = losers = addr_losers = 0;
    2236                 :   246913189 :       static_reject = reject = reload_nregs = reload_sum = 0;
    2237                 :   819762334 :       for (nop = 0; nop < n_operands; nop++)
    2238                 :             :         {
    2239                 :   572849145 :           int inc = (curr_static_id
    2240                 :   572849145 :                      ->operand_alternative[nalt * n_operands + nop].reject);
    2241                 :   572849145 :           if (lra_dump_file != NULL && inc != 0)
    2242                 :          51 :             fprintf (lra_dump_file,
    2243                 :             :                      "            Staticly defined alt reject+=%d\n", inc);
    2244                 :   572849145 :           static_reject += inc;
    2245                 :   572849145 :           matching_early_clobber[nop] = 0;
    2246                 :             :         }
    2247                 :             :       reject += static_reject;
    2248                 :             :       early_clobbered_regs_num = 0;
    2249                 :             :       curr_alt_out_sp_reload_p = false;
    2250                 :             :       curr_reuse_alt_p = true;
    2251                 :             :       curr_alt_class_change_p = false;
    2252                 :             :       all_this_alternative = NO_REGS;
    2253                 :             :       all_used_nregs = all_reload_nregs = 0;
    2254                 :   639262552 :       for (nop = 0; nop < n_operands; nop++)
    2255                 :             :         {
    2256                 :   509637434 :           const char *p;
    2257                 :   509637434 :           char *end;
    2258                 :   509637434 :           int len, c, m, i, opalt_num, this_alternative_matches;
    2259                 :   509637434 :           bool win, did_match, offmemok, early_clobber_p;
    2260                 :             :           /* false => this operand can be reloaded somehow for this
    2261                 :             :              alternative.  */
    2262                 :   509637434 :           bool badop;
    2263                 :             :           /* true => this operand can be reloaded if the alternative
    2264                 :             :              allows regs.  */
    2265                 :   509637434 :           bool winreg;
    2266                 :             :           /* True if a constant forced into memory would be OK for
    2267                 :             :              this operand.  */
    2268                 :   509637434 :           bool constmemok;
    2269                 :   509637434 :           enum reg_class this_alternative, this_costly_alternative;
    2270                 :   509637434 :           HARD_REG_SET this_alternative_set, this_costly_alternative_set;
    2271                 :   509637434 :           HARD_REG_SET this_alternative_exclude_start_hard_regs;
    2272                 :   509637434 :           bool this_alternative_match_win, this_alternative_win;
    2273                 :   509637434 :           bool this_alternative_offmemok;
    2274                 :   509637434 :           bool scratch_p;
    2275                 :   509637434 :           machine_mode mode;
    2276                 :   509637434 :           enum constraint_num cn;
    2277                 :   509637434 :           bool class_change_p = false;
    2278                 :             : 
    2279                 :   509637434 :           opalt_num = nalt * n_operands + nop;
    2280                 :   509637434 :           if (curr_static_id->operand_alternative[opalt_num].anything_ok)
    2281                 :             :             {
    2282                 :             :               /* Fast track for no constraints at all.  */
    2283                 :    14241755 :               curr_alt[nop] = NO_REGS;
    2284                 :    14241755 :               CLEAR_HARD_REG_SET (curr_alt_set[nop]);
    2285                 :    14241755 :               curr_alt_win[nop] = true;
    2286                 :    14241755 :               curr_alt_match_win[nop] = false;
    2287                 :    14241755 :               curr_alt_offmemok[nop] = false;
    2288                 :    14241755 :               curr_alt_matches[nop] = -1;
    2289                 :    14241755 :               continue;
    2290                 :             :             }
    2291                 :             : 
    2292                 :   495395679 :           op = no_subreg_reg_operand[nop];
    2293                 :   495395679 :           mode = curr_operand_mode[nop];
    2294                 :             : 
    2295                 :   495395679 :           win = did_match = winreg = offmemok = constmemok = false;
    2296                 :   495395679 :           badop = true;
    2297                 :             : 
    2298                 :   495395679 :           early_clobber_p = false;
    2299                 :   495395679 :           p = curr_static_id->operand_alternative[opalt_num].constraint;
    2300                 :             : 
    2301                 :   495395679 :           this_costly_alternative = this_alternative = NO_REGS;
    2302                 :             :           /* We update set of possible hard regs besides its class
    2303                 :             :              because reg class might be inaccurate.  For example,
    2304                 :             :              union of LO_REGS (l), HI_REGS(h), and STACK_REG(k) in ARM
    2305                 :             :              is translated in HI_REGS because classes are merged by
    2306                 :             :              pairs and there is no accurate intermediate class.  */
    2307                 :  1981582716 :           CLEAR_HARD_REG_SET (this_alternative_set);
    2308                 :  1486187037 :           CLEAR_HARD_REG_SET (this_costly_alternative_set);
    2309                 :   495395679 :           CLEAR_HARD_REG_SET (this_alternative_exclude_start_hard_regs);
    2310                 :   495395679 :           this_alternative_win = false;
    2311                 :   495395679 :           this_alternative_match_win = false;
    2312                 :   495395679 :           this_alternative_offmemok = false;
    2313                 :   495395679 :           this_alternative_matches = -1;
    2314                 :             : 
    2315                 :             :           /* An empty constraint should be excluded by the fast
    2316                 :             :              track.  */
    2317                 :   495395679 :           lra_assert (*p != 0 && *p != ',');
    2318                 :             : 
    2319                 :             :           op_reject = 0;
    2320                 :             :           /* Scan this alternative's specs for this operand; set WIN
    2321                 :             :              if the operand fits any letter in this alternative.
    2322                 :             :              Otherwise, clear BADOP if this operand could fit some
    2323                 :             :              letter after reloads, or set WINREG if this operand could
    2324                 :             :              fit after reloads provided the constraint allows some
    2325                 :             :              registers.  */
    2326                 :             :           costly_p = false;
    2327                 :  1260649918 :           do
    2328                 :             :             {
    2329                 :  1260649918 :               switch ((c = *p, len = CONSTRAINT_LEN (c, p)), c)
    2330                 :             :                 {
    2331                 :             :                 case '\0':
    2332                 :             :                   len = 0;
    2333                 :             :                   break;
    2334                 :   473917405 :                 case ',':
    2335                 :   473917405 :                   c = '\0';
    2336                 :   473917405 :                   break;
    2337                 :             : 
    2338                 :      173444 :                 case '&':
    2339                 :      173444 :                   early_clobber_p = true;
    2340                 :      173444 :                   break;
    2341                 :             : 
    2342                 :       16036 :                 case '$':
    2343                 :       16036 :                   op_reject += LRA_MAX_REJECT;
    2344                 :       16036 :                   break;
    2345                 :           0 :                 case '^':
    2346                 :           0 :                   op_reject += LRA_LOSER_COST_FACTOR;
    2347                 :           0 :                   break;
    2348                 :             : 
    2349                 :           0 :                 case '#':
    2350                 :             :                   /* Ignore rest of this alternative.  */
    2351                 :           0 :                   c = '\0';
    2352                 :           0 :                   break;
    2353                 :             : 
    2354                 :    54583639 :                 case '0':  case '1':  case '2':  case '3':  case '4':
    2355                 :    54583639 :                 case '5':  case '6':  case '7':  case '8':  case '9':
    2356                 :    54583639 :                   {
    2357                 :    54583639 :                     int m_hregno;
    2358                 :    54583639 :                     bool match_p;
    2359                 :             : 
    2360                 :    54583639 :                     m = strtoul (p, &end, 10);
    2361                 :    54583639 :                     p = end;
    2362                 :    54583639 :                     len = 0;
    2363                 :    54583639 :                     lra_assert (nop > m);
    2364                 :             : 
    2365                 :             :                     /* Reject matches if we don't know which operand is
    2366                 :             :                        bigger.  This situation would arguably be a bug in
    2367                 :             :                        an .md pattern, but could also occur in a user asm.  */
    2368                 :   163750917 :                     if (!ordered_p (GET_MODE_SIZE (biggest_mode[m]),
    2369                 :    54583639 :                                     GET_MODE_SIZE (biggest_mode[nop])))
    2370                 :             :                       break;
    2371                 :             : 
    2372                 :             :                     /* Don't match wrong asm insn operands for proper
    2373                 :             :                        diagnostic later.  */
    2374                 :    54583639 :                     if (INSN_CODE (curr_insn) < 0
    2375                 :       31016 :                         && (curr_operand_mode[m] == BLKmode
    2376                 :       31015 :                             || curr_operand_mode[nop] == BLKmode)
    2377                 :           1 :                         && curr_operand_mode[m] != curr_operand_mode[nop])
    2378                 :             :                       break;
    2379                 :             : 
    2380                 :    54583638 :                     m_hregno = get_hard_regno (*curr_id->operand_loc[m]);
    2381                 :             :                     /* We are supposed to match a previous operand.
    2382                 :             :                        If we do, we win if that one did.  If we do
    2383                 :             :                        not, count both of the operands as losers.
    2384                 :             :                        (This is too conservative, since most of the
    2385                 :             :                        time only a single reload insn will be needed
    2386                 :             :                        to make the two operands win.  As a result,
    2387                 :             :                        this alternative may be rejected when it is
    2388                 :             :                        actually desirable.)  */
    2389                 :    54583638 :                     match_p = false;
    2390                 :    54583638 :                     if (operands_match_p (*curr_id->operand_loc[nop],
    2391                 :    54583638 :                                           *curr_id->operand_loc[m], m_hregno))
    2392                 :             :                       {
    2393                 :             :                         /* We should reject matching of an early
    2394                 :             :                            clobber operand if the matching operand is
    2395                 :             :                            not dying in the insn.  */
    2396                 :    14434474 :                         if (!TEST_BIT (curr_static_id->operand[m]
    2397                 :             :                                        .early_clobber_alts, nalt)
    2398                 :       18844 :                             || operand_reg[nop] == NULL_RTX
    2399                 :    14453318 :                             || (find_regno_note (curr_insn, REG_DEAD,
    2400                 :             :                                                  REGNO (op))
    2401                 :        4547 :                                 || REGNO (op) == REGNO (operand_reg[m])))
    2402                 :    14434474 :                           match_p = true;
    2403                 :             :                       }
    2404                 :    14434474 :                     if (match_p)
    2405                 :             :                       {
    2406                 :             :                         /* If we are matching a non-offsettable
    2407                 :             :                            address where an offsettable address was
    2408                 :             :                            expected, then we must reject this
    2409                 :             :                            combination, because we can't reload
    2410                 :             :                            it.  */
    2411                 :    14434474 :                         if (curr_alt_offmemok[m]
    2412                 :        1411 :                             && MEM_P (*curr_id->operand_loc[m])
    2413                 :           0 :                             && curr_alt[m] == NO_REGS && ! curr_alt_win[m])
    2414                 :           0 :                           continue;
    2415                 :             :                       }
    2416                 :             :                     else
    2417                 :             :                       {
    2418                 :             :                         /* If the operands do not match and one
    2419                 :             :                            operand is INOUT, we can not match them.
    2420                 :             :                            Try other possibilities, e.g. other
    2421                 :             :                            alternatives or commutative operand
    2422                 :             :                            exchange.  */
    2423                 :    40149164 :                         if (curr_static_id->operand[nop].type == OP_INOUT
    2424                 :    40149164 :                             || curr_static_id->operand[m].type == OP_INOUT)
    2425                 :             :                           break;
    2426                 :             :                         /* Operands don't match.  If the operands are
    2427                 :             :                            different user defined explicit hard
    2428                 :             :                            registers, then we cannot make them match
    2429                 :             :                            when one is early clobber operand.  */
    2430                 :    40148615 :                         if ((REG_P (*curr_id->operand_loc[nop])
    2431                 :    25321452 :                              || SUBREG_P (*curr_id->operand_loc[nop]))
    2432                 :    15454411 :                             && (REG_P (*curr_id->operand_loc[m])
    2433                 :      196113 :                                 || SUBREG_P (*curr_id->operand_loc[m])))
    2434                 :             :                           {
    2435                 :    15367578 :                             rtx nop_reg = *curr_id->operand_loc[nop];
    2436                 :    15367578 :                             if (SUBREG_P (nop_reg))
    2437                 :      619944 :                               nop_reg = SUBREG_REG (nop_reg);
    2438                 :    15367578 :                             rtx m_reg = *curr_id->operand_loc[m];
    2439                 :    15367578 :                             if (SUBREG_P (m_reg))
    2440                 :      109280 :                               m_reg = SUBREG_REG (m_reg);
    2441                 :             : 
    2442                 :    15367578 :                             if (REG_P (nop_reg)
    2443                 :    15367578 :                                 && HARD_REGISTER_P (nop_reg)
    2444                 :     4322698 :                                 && REG_USERVAR_P (nop_reg)
    2445                 :          11 :                                 && REG_P (m_reg)
    2446                 :          11 :                                 && HARD_REGISTER_P (m_reg)
    2447                 :    15367578 :                                 && REG_USERVAR_P (m_reg))
    2448                 :             :                               {
    2449                 :             :                                 int i;
    2450                 :             : 
    2451                 :           0 :                                 for (i = 0; i < early_clobbered_regs_num; i++)
    2452                 :           0 :                                   if (m == early_clobbered_nops[i])
    2453                 :             :                                     break;
    2454                 :           0 :                                 if (i < early_clobbered_regs_num
    2455                 :           0 :                                     || early_clobber_p)
    2456                 :             :                                   break;
    2457                 :             :                               }
    2458                 :             :                           }
    2459                 :             :                         /* Both operands must allow a reload register,
    2460                 :             :                            otherwise we cannot make them match.  */
    2461                 :    40148615 :                         if (curr_alt[m] == NO_REGS)
    2462                 :             :                           break;
    2463                 :             :                         /* Retroactively mark the operand we had to
    2464                 :             :                            match as a loser, if it wasn't already and
    2465                 :             :                            it wasn't matched to a register constraint
    2466                 :             :                            (e.g it might be matched by memory). */
    2467                 :    40136521 :                         if (curr_alt_win[m]
    2468                 :    39308918 :                             && (operand_reg[m] == NULL_RTX
    2469                 :    38833889 :                                 || hard_regno[m] < 0))
    2470                 :             :                           {
    2471                 :     1233939 :                             if (lra_dump_file != NULL)
    2472                 :          10 :                               fprintf
    2473                 :          10 :                                 (lra_dump_file,
    2474                 :             :                                  "            %d Matched operand reload: "
    2475                 :             :                                  "losers++\n", m);
    2476                 :     1233939 :                             losers++;
    2477                 :     1233939 :                             reload_nregs
    2478                 :     1233939 :                               += (ira_reg_class_max_nregs[curr_alt[m]]
    2479                 :     1233939 :                                   [GET_MODE (*curr_id->operand_loc[m])]);
    2480                 :             :                           }
    2481                 :             : 
    2482                 :             :                         /* Prefer matching earlyclobber alternative as
    2483                 :             :                            it results in less hard regs required for
    2484                 :             :                            the insn than a non-matching earlyclobber
    2485                 :             :                            alternative.  */
    2486                 :    40136521 :                         if (TEST_BIT (curr_static_id->operand[m]
    2487                 :             :                                       .early_clobber_alts, nalt))
    2488                 :             :                           {
    2489                 :       17894 :                             if (lra_dump_file != NULL)
    2490                 :           0 :                               fprintf
    2491                 :           0 :                                 (lra_dump_file,
    2492                 :             :                                  "            %d Matching earlyclobber alt:"
    2493                 :             :                                  " reject--\n",
    2494                 :             :                                  nop);
    2495                 :       17894 :                             if (!matching_early_clobber[m])
    2496                 :             :                               {
    2497                 :       17894 :                                 reject--;
    2498                 :       17894 :                                 matching_early_clobber[m] = 1;
    2499                 :             :                               }
    2500                 :             :                           }
    2501                 :             :                         /* Otherwise we prefer no matching
    2502                 :             :                            alternatives because it gives more freedom
    2503                 :             :                            in RA.  */
    2504                 :    40118627 :                         else if (operand_reg[nop] == NULL_RTX
    2505                 :    40118627 :                                  || (find_regno_note (curr_insn, REG_DEAD,
    2506                 :    15431109 :                                                       REGNO (operand_reg[nop]))
    2507                 :             :                                      == NULL_RTX))
    2508                 :             :                           {
    2509                 :    35423956 :                             if (lra_dump_file != NULL)
    2510                 :         964 :                               fprintf
    2511                 :         964 :                                 (lra_dump_file,
    2512                 :             :                                  "            %d Matching alt: reject+=2\n",
    2513                 :             :                                  nop);
    2514                 :    35423956 :                             reject += 2;
    2515                 :             :                           }
    2516                 :             :                       }
    2517                 :             :                     /* If we have to reload this operand and some
    2518                 :             :                        previous operand also had to match the same
    2519                 :             :                        thing as this operand, we don't know how to do
    2520                 :             :                        that.  */
    2521                 :    54570995 :                     if (!match_p || !curr_alt_win[m])
    2522                 :             :                       {
    2523                 :    84445050 :                         for (i = 0; i < nop; i++)
    2524                 :    44166789 :                           if (curr_alt_matches[i] == m)
    2525                 :             :                             break;
    2526                 :    40278262 :                         if (i < nop)
    2527                 :             :                           break;
    2528                 :             :                       }
    2529                 :             :                     else
    2530                 :             :                       did_match = true;
    2531                 :             : 
    2532                 :    54570994 :                     this_alternative_matches = m;
    2533                 :             :                     /* This can be fixed with reloads if the operand
    2534                 :             :                        we are supposed to match can be fixed with
    2535                 :             :                        reloads. */
    2536                 :    54570994 :                     badop = false;
    2537                 :    54570994 :                     this_alternative = curr_alt[m];
    2538                 :    54570994 :                     this_alternative_set = curr_alt_set[m];
    2539                 :    54570994 :                     this_alternative_exclude_start_hard_regs
    2540                 :    54570994 :                         = curr_alt_exclude_start_hard_regs[m];
    2541                 :    54570994 :                     winreg = this_alternative != NO_REGS;
    2542                 :    54570994 :                     break;
    2543                 :             :                   }
    2544                 :             : 
    2545                 :    11429729 :                 case 'g':
    2546                 :    11429729 :                   if (MEM_P (op)
    2547                 :     7561968 :                       || general_constant_p (op)
    2548                 :    15975320 :                       || spilled_pseudo_p (op))
    2549                 :             :                     win = true;
    2550                 :    11429729 :                   cl = GENERAL_REGS;
    2551                 :    11429729 :                   cl_filter = nullptr;
    2552                 :    11429729 :                   goto reg;
    2553                 :             : 
    2554                 :   699051391 :                 default:
    2555                 :   699051391 :                   cn = lookup_constraint (p);
    2556                 :   699051391 :                   switch (get_constraint_type (cn))
    2557                 :             :                     {
    2558                 :   464658610 :                     case CT_REGISTER:
    2559                 :   464658610 :                       cl = reg_class_for_constraint (cn);
    2560                 :   340093983 :                       if (cl != NO_REGS)
    2561                 :             :                         {
    2562                 :   330646524 :                           cl_filter = get_register_filter (cn);
    2563                 :   330646524 :                           goto reg;
    2564                 :             :                         }
    2565                 :             :                       break;
    2566                 :             : 
    2567                 :     1978289 :                     case CT_CONST_INT:
    2568                 :     1978289 :                       if (CONST_INT_P (op)
    2569                 :     1978289 :                           && insn_const_int_ok_for_constraint (INTVAL (op), cn))
    2570                 :             :                         win = true;
    2571                 :             :                       break;
    2572                 :             : 
    2573                 :   106270850 :                     case CT_MEMORY:
    2574                 :   106270850 :                     case CT_RELAXED_MEMORY:
    2575                 :   106270850 :                       if (MEM_P (op)
    2576                 :   106270850 :                           && satisfies_memory_constraint_p (op, cn))
    2577                 :             :                         win = true;
    2578                 :    72454878 :                       else if (spilled_pseudo_p (op))
    2579                 :    42909036 :                         win = true;
    2580                 :             : 
    2581                 :             :                       /* If we didn't already win, we can reload constants
    2582                 :             :                          via force_const_mem or put the pseudo value into
    2583                 :             :                          memory, or make other memory by reloading the
    2584                 :             :                          address like for 'o'.  */
    2585                 :   111128598 :                       if (CONST_POOL_OK_P (mode, op)
    2586                 :   101412951 :                           || MEM_P (op) || REG_P (op)
    2587                 :             :                           /* We can restore the equiv insn by a
    2588                 :             :                              reload.  */
    2589                 :   106796208 :                           || equiv_substition_p[nop])
    2590                 :   106236357 :                         badop = false;
    2591                 :             :                       constmemok = true;
    2592                 :             :                       offmemok = true;
    2593                 :             :                       break;
    2594                 :             : 
    2595                 :     1531962 :                     case CT_ADDRESS:
    2596                 :             :                       /* An asm operand with an address constraint
    2597                 :             :                          that doesn't satisfy address_operand has
    2598                 :             :                          is_address cleared, so that we don't try to
    2599                 :             :                          make a non-address fit.  */
    2600                 :     1531962 :                       if (!curr_static_id->operand[nop].is_address)
    2601                 :             :                         break;
    2602                 :             :                       /* If we didn't already win, we can reload the address
    2603                 :             :                          into a base register.  */
    2604                 :     1531943 :                       if (satisfies_address_constraint_p (op, cn))
    2605                 :     1531943 :                         win = true;
    2606                 :     1531943 :                       cl = base_reg_class (VOIDmode, ADDR_SPACE_GENERIC,
    2607                 :             :                                            ADDRESS, SCRATCH);
    2608                 :     1531943 :                       cl_filter = nullptr;
    2609                 :     1531943 :                       badop = false;
    2610                 :     1531943 :                       goto reg;
    2611                 :             : 
    2612                 :   123387995 :                     case CT_FIXED_FORM:
    2613                 :   123387995 :                       if (constraint_satisfied_p (op, cn))
    2614                 :  1260649918 :                         win = true;
    2615                 :             :                       break;
    2616                 :             : 
    2617                 :     1223685 :                     case CT_SPECIAL_MEMORY:
    2618                 :     1223685 :                       if (satisfies_memory_constraint_p (op, cn))
    2619                 :             :                         win = true;
    2620                 :     1056172 :                       else if (spilled_pseudo_p (op))
    2621                 :             :                         {
    2622                 :  1260649918 :                           curr_reuse_alt_p = false;
    2623                 :  1260649918 :                           win = true;
    2624                 :             :                         }
    2625                 :             :                       break;
    2626                 :             :                     }
    2627                 :             :                   break;
    2628                 :             : 
    2629                 :   343608196 :                 reg:
    2630                 :   343608196 :                   if (mode == BLKmode)
    2631                 :             :                     break;
    2632                 :   343608178 :                   this_alternative = reg_class_subunion[this_alternative][cl];
    2633                 :   343608178 :                   if (hard_reg_set_subset_p (this_alternative_set,
    2634                 :   343608178 :                                              reg_class_contents[cl]))
    2635                 :   343604553 :                     this_alternative_exclude_start_hard_regs
    2636                 :   343604553 :                       = ira_exclude_class_mode_regs[cl][mode];
    2637                 :        3625 :                   else if (!hard_reg_set_subset_p (reg_class_contents[cl],
    2638                 :             :                                                    this_alternative_set))
    2639                 :        3624 :                     this_alternative_exclude_start_hard_regs
    2640                 :  1030828158 :                       |= ira_exclude_class_mode_regs[cl][mode];
    2641                 :   343608178 :                   this_alternative_set |= reg_class_contents[cl];
    2642                 :   343608178 :                   if (cl_filter)
    2643                 :             :                     this_alternative_exclude_start_hard_regs |= ~*cl_filter;
    2644                 :   343608178 :                   if (costly_p)
    2645                 :             :                     {
    2646                 :    21218204 :                       this_costly_alternative
    2647                 :    21218204 :                         = reg_class_subunion[this_costly_alternative][cl];
    2648                 :    21218204 :                       this_costly_alternative_set |= reg_class_contents[cl];
    2649                 :             :                     }
    2650                 :   343608178 :                   winreg = true;
    2651                 :   343608178 :                   if (REG_P (op))
    2652                 :             :                     {
    2653                 :   220556358 :                       tree decl;
    2654                 :   220556358 :                       if (hard_regno[nop] >= 0
    2655                 :   186012401 :                           && in_hard_reg_set_p (this_alternative_set,
    2656                 :             :                                                 mode, hard_regno[nop])
    2657                 :             :                           && (!cl_filter
    2658                 :             :                               || TEST_HARD_REG_BIT (*cl_filter,
    2659                 :             :                                                     hard_regno[nop]))
    2660                 :   387972764 :                           && ((REG_ATTRS (op) && (decl = REG_EXPR (op)) != NULL
    2661                 :    93014087 :                                && VAR_P (decl) && DECL_HARD_REGISTER (decl))
    2662                 :   167413117 :                               || !(TEST_HARD_REG_BIT
    2663                 :   167413117 :                                    (this_alternative_exclude_start_hard_regs,
    2664                 :             :                                     hard_regno[nop]))))
    2665                 :             :                         win = true;
    2666                 :    53139977 :                       else if (hard_regno[nop] < 0)
    2667                 :             :                         {
    2668                 :    34543957 :                           if (in_class_p (op, this_alternative, NULL))
    2669                 :             :                             win = true;
    2670                 :    25972294 :                           else if (in_class_p (op, this_alternative, NULL, true))
    2671                 :             :                             {
    2672                 :  1260649918 :                               class_change_p = true;
    2673                 :  1260649918 :                               win = true;
    2674                 :             :                             }
    2675                 :             :                         }
    2676                 :             :                     }
    2677                 :             :                   break;
    2678                 :             :                 }
    2679                 :  1260649918 :               if (c != ' ' && c != '\t')
    2680                 :  1260649918 :                 costly_p = c == '*';
    2681                 :             :             }
    2682                 :  1260649918 :           while ((p += len), c);
    2683                 :             : 
    2684                 :   990791358 :           scratch_p = (operand_reg[nop] != NULL_RTX
    2685                 :   495395679 :                        && ira_former_scratch_p (REGNO (operand_reg[nop])));
    2686                 :             :           /* Record which operands fit this alternative.  */
    2687                 :   495395679 :           if (win)
    2688                 :             :             {
    2689                 :   267201754 :               if (early_clobber_p
    2690                 :   267060473 :                   || curr_static_id->operand[nop].type != OP_OUT)
    2691                 :             :                 {
    2692                 :   116310784 :                   if (winreg)
    2693                 :    95678045 :                     all_used_nregs
    2694                 :    95678045 :                       += ira_reg_class_min_nregs[this_alternative][mode];
    2695                 :   116310784 :                   all_this_alternative
    2696                 :   116310784 :                     = (reg_class_subunion
    2697                 :   116310784 :                        [all_this_alternative][this_alternative]);
    2698                 :             :                 }
    2699                 :   267201754 :               this_alternative_win = true;
    2700                 :   267201754 :               if (class_change_p)
    2701                 :             :                 {
    2702                 :      242204 :                   curr_alt_class_change_p = true;
    2703                 :      242204 :                   if (lra_dump_file != NULL)
    2704                 :           4 :                     fprintf (lra_dump_file,
    2705                 :             :                              "            %d Narrowing class: reject+=3\n",
    2706                 :             :                              nop);
    2707                 :      242204 :                   reject += 3;
    2708                 :             :                 }
    2709                 :   267201754 :               if (operand_reg[nop] != NULL_RTX)
    2710                 :             :                 {
    2711                 :   186707579 :                   if (hard_regno[nop] >= 0)
    2712                 :             :                     {
    2713                 :   167360935 :                       if (in_hard_reg_set_p (this_costly_alternative_set,
    2714                 :             :                                              mode, hard_regno[nop]))
    2715                 :             :                         {
    2716                 :      807743 :                           if (lra_dump_file != NULL)
    2717                 :          17 :                             fprintf (lra_dump_file,
    2718                 :             :                                      "            %d Costly set: reject++\n",
    2719                 :             :                                      nop);
    2720                 :      807743 :                           reject++;
    2721                 :             :                         }
    2722                 :             :                     }
    2723                 :             :                   else
    2724                 :             :                     {
    2725                 :             :                       /* Prefer won reg to spilled pseudo under other
    2726                 :             :                          equal conditions for possibe inheritance.  */
    2727                 :    19346644 :                       if (! scratch_p)
    2728                 :             :                         {
    2729                 :    19342238 :                           if (lra_dump_file != NULL)
    2730                 :          41 :                             fprintf
    2731                 :          41 :                               (lra_dump_file,
    2732                 :             :                                "            %d Non pseudo reload: reject++\n",
    2733                 :             :                                nop);
    2734                 :    19342238 :                           reject++;
    2735                 :             :                         }
    2736                 :    19346644 :                       if (in_class_p (operand_reg[nop],
    2737                 :             :                                       this_costly_alternative, NULL, true))
    2738                 :             :                         {
    2739                 :      126600 :                           if (lra_dump_file != NULL)
    2740                 :           0 :                             fprintf
    2741                 :           0 :                               (lra_dump_file,
    2742                 :             :                                "            %d Non pseudo costly reload:"
    2743                 :             :                                " reject++\n",
    2744                 :             :                                nop);
    2745                 :      126600 :                           reject++;
    2746                 :             :                         }
    2747                 :             :                     }
    2748                 :             :                   /* We simulate the behavior of old reload here.
    2749                 :             :                      Although scratches need hard registers and it
    2750                 :             :                      might result in spilling other pseudos, no reload
    2751                 :             :                      insns are generated for the scratches.  So it
    2752                 :             :                      might cost something but probably less than old
    2753                 :             :                      reload pass believes.  */
    2754                 :   186707579 :                   if (scratch_p)
    2755                 :             :                     {
    2756                 :      116740 :                       if (lra_dump_file != NULL)
    2757                 :           4 :                         fprintf (lra_dump_file,
    2758                 :             :                                  "            %d Scratch win: reject+=2\n",
    2759                 :             :                                  nop);
    2760                 :      116740 :                       reject += 2;
    2761                 :             :                     }
    2762                 :             :                 }
    2763                 :             :             }
    2764                 :   228193925 :           else if (did_match)
    2765                 :             :             this_alternative_match_win = true;
    2766                 :             :           else
    2767                 :             :             {
    2768                 :   213901192 :               int const_to_mem = 0;
    2769                 :   213901192 :               bool no_regs_p;
    2770                 :             : 
    2771                 :   213901192 :               reject += op_reject;
    2772                 :             :               /* Mark output reload of the stack pointer.  */
    2773                 :   213901192 :               if (op == stack_pointer_rtx
    2774                 :       51751 :                   && curr_static_id->operand[nop].type != OP_IN)
    2775                 :   213901192 :                 curr_alt_out_sp_reload_p = true;
    2776                 :             : 
    2777                 :             :               /* If this alternative asks for a specific reg class, see if there
    2778                 :             :                  is at least one allocatable register in that class.  */
    2779                 :   213901192 :               no_regs_p
    2780                 :   373891603 :                 = (this_alternative == NO_REGS
    2781                 :   213901192 :                    || (hard_reg_set_subset_p
    2782                 :   319980844 :                        (reg_class_contents[this_alternative],
    2783                 :             :                         lra_no_alloc_regs)));
    2784                 :             : 
    2785                 :             :               /* For asms, verify that the class for this alternative is possible
    2786                 :             :                  for the mode that is specified.  */
    2787                 :   159990411 :               if (!no_regs_p && INSN_CODE (curr_insn) < 0)
    2788                 :             :                 {
    2789                 :             :                   int i;
    2790                 :       67044 :                   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
    2791                 :       67042 :                     if (targetm.hard_regno_mode_ok (i, mode)
    2792                 :       67042 :                         && in_hard_reg_set_p (reg_class_contents[this_alternative],
    2793                 :             :                                               mode, i))
    2794                 :             :                       break;
    2795                 :       18368 :                   if (i == FIRST_PSEUDO_REGISTER)
    2796                 :   213901192 :                     winreg = false;
    2797                 :             :                 }
    2798                 :             : 
    2799                 :             :               /* If this operand accepts a register, and if the
    2800                 :             :                  register class has at least one allocatable register,
    2801                 :             :                  then this operand can be reloaded.  */
    2802                 :   213901192 :               if (winreg && !no_regs_p)
    2803                 :             :                 badop = false;
    2804                 :             : 
    2805                 :    53910783 :               if (badop)
    2806                 :             :                 {
    2807                 :    44530402 :                   if (lra_dump_file != NULL)
    2808                 :         614 :                     fprintf (lra_dump_file,
    2809                 :             :                              "            Bad operand -- refuse\n");
    2810                 :   117288071 :                   goto fail;
    2811                 :             :                 }
    2812                 :             : 
    2813                 :   169370790 :               if (this_alternative != NO_REGS)
    2814                 :             :                 {
    2815                 :   159990410 :                   HARD_REG_SET available_regs
    2816                 :   159990410 :                     = (reg_class_contents[this_alternative]
    2817                 :   159990410 :                        & ~((ira_prohibited_class_mode_regs
    2818                 :   159990410 :                             [this_alternative][mode])
    2819                 :   159990410 :                            | lra_no_alloc_regs));
    2820                 :   319980820 :                   if (!hard_reg_set_empty_p (available_regs))
    2821                 :             :                     {
    2822                 :   159989068 :                       if (early_clobber_p
    2823                 :   159956905 :                           || curr_static_id->operand[nop].type != OP_OUT)
    2824                 :             :                         {
    2825                 :    85027049 :                           all_reload_nregs
    2826                 :    85027049 :                             += ira_reg_class_min_nregs[this_alternative][mode];
    2827                 :    85027049 :                           all_this_alternative
    2828                 :    85027049 :                             = (reg_class_subunion
    2829                 :    85027049 :                                [all_this_alternative][this_alternative]);
    2830                 :             :                         }
    2831                 :             :                     }
    2832                 :             :                   else
    2833                 :             :                     {
    2834                 :             :                       /* There are no hard regs holding a value of given
    2835                 :             :                          mode.  */
    2836                 :        1342 :                       if (offmemok)
    2837                 :             :                         {
    2838                 :         200 :                           this_alternative = NO_REGS;
    2839                 :         200 :                           if (lra_dump_file != NULL)
    2840                 :           0 :                             fprintf (lra_dump_file,
    2841                 :             :                                      "            %d Using memory because of"
    2842                 :             :                                      " a bad mode: reject+=2\n",
    2843                 :             :                                      nop);
    2844                 :         200 :                           reject += 2;
    2845                 :             :                         }
    2846                 :             :                       else
    2847                 :             :                         {
    2848                 :        1142 :                           if (lra_dump_file != NULL)
    2849                 :           0 :                             fprintf (lra_dump_file,
    2850                 :             :                                      "            Wrong mode -- refuse\n");
    2851                 :        1142 :                           goto fail;
    2852                 :             :                         }
    2853                 :             :                     }
    2854                 :             :                 }
    2855                 :             : 
    2856                 :             :               /* If not assigned pseudo has a class which a subset of
    2857                 :             :                  required reg class, it is a less costly alternative
    2858                 :             :                  as the pseudo still can get a hard reg of necessary
    2859                 :             :                  class.  */
    2860                 :   159989268 :               if (! no_regs_p && REG_P (op) && hard_regno[nop] < 0
    2861                 :    20800439 :                   && (cl = get_reg_class (REGNO (op))) != NO_REGS
    2862                 :   172659886 :                   && ira_class_subset_p[this_alternative][cl])
    2863                 :             :                 {
    2864                 :        1131 :                   if (lra_dump_file != NULL)
    2865                 :           0 :                     fprintf
    2866                 :           0 :                       (lra_dump_file,
    2867                 :             :                        "            %d Super set class reg: reject-=3\n", nop);
    2868                 :        1131 :                   reject -= 3;
    2869                 :             :                 }
    2870                 :             : 
    2871                 :   169369648 :               this_alternative_offmemok = offmemok;
    2872                 :   169369648 :               if (this_costly_alternative != NO_REGS)
    2873                 :             :                 {
    2874                 :    19004966 :                   if (lra_dump_file != NULL)
    2875                 :          43 :                     fprintf (lra_dump_file,
    2876                 :             :                              "            %d Costly loser: reject++\n", nop);
    2877                 :    19004966 :                   reject++;
    2878                 :             :                 }
    2879                 :             :               /* If the operand is dying, has a matching constraint,
    2880                 :             :                  and satisfies constraints of the matched operand
    2881                 :             :                  which failed to satisfy the own constraints, most probably
    2882                 :             :                  the reload for this operand will be gone.  */
    2883                 :   169369648 :               if (this_alternative_matches >= 0
    2884                 :    40261356 :                   && !curr_alt_win[this_alternative_matches]
    2885                 :      968917 :                   && REG_P (op)
    2886                 :      718932 :                   && find_regno_note (curr_insn, REG_DEAD, REGNO (op))
    2887                 :   170068915 :                   && (hard_regno[nop] >= 0
    2888                 :      365061 :                       ? in_hard_reg_set_p (this_alternative_set,
    2889                 :             :                                            mode, hard_regno[nop])
    2890                 :       30855 :                       : in_class_p (op, this_alternative, NULL)))
    2891                 :             :                 {
    2892                 :      219927 :                   if (lra_dump_file != NULL)
    2893                 :           2 :                     fprintf
    2894                 :           2 :                       (lra_dump_file,
    2895                 :             :                        "            %d Dying matched operand reload: reject++\n",
    2896                 :             :                        nop);
    2897                 :      219927 :                   reject++;
    2898                 :             :                 }
    2899                 :             :               else
    2900                 :             :                 {
    2901                 :             :                   /* Strict_low_part requires to reload the register
    2902                 :             :                      not the sub-register.  In this case we should
    2903                 :             :                      check that a final reload hard reg can hold the
    2904                 :             :                      value mode.  */
    2905                 :   169149721 :                   if (curr_static_id->operand[nop].strict_low
    2906                 :         136 :                       && REG_P (op)
    2907                 :         129 :                       && hard_regno[nop] < 0
    2908                 :          99 :                       && GET_CODE (*curr_id->operand_loc[nop]) == SUBREG
    2909                 :          99 :                       && ira_class_hard_regs_num[this_alternative] > 0
    2910                 :   169149820 :                       && (!targetm.hard_regno_mode_ok
    2911                 :          99 :                           (ira_class_hard_regs[this_alternative][0],
    2912                 :          99 :                            GET_MODE (*curr_id->operand_loc[nop]))))
    2913                 :             :                     {
    2914                 :           0 :                       if (lra_dump_file != NULL)
    2915                 :           0 :                         fprintf
    2916                 :           0 :                           (lra_dump_file,
    2917                 :             :                            "            Strict low subreg reload -- refuse\n");
    2918                 :           0 :                       goto fail;
    2919                 :             :                     }
    2920                 :   169149721 :                   if (lra_dump_file != NULL)
    2921                 :        2251 :                     fprintf
    2922                 :        2251 :                       (lra_dump_file,
    2923                 :             :                        "            %d Operand reload: losers++\n", nop);
    2924                 :   169149721 :                   losers++;
    2925                 :             :                 }
    2926                 :   169369648 :               if (operand_reg[nop] != NULL_RTX
    2927                 :             :                   /* Output operands and matched input operands are
    2928                 :             :                      not inherited.  The following conditions do not
    2929                 :             :                      exactly describe the previous statement but they
    2930                 :             :                      are pretty close.  */
    2931                 :    62435036 :                   && curr_static_id->operand[nop].type != OP_OUT
    2932                 :    27139220 :                   && (this_alternative_matches < 0
    2933                 :    15551524 :                       || curr_static_id->operand[nop].type != OP_IN))
    2934                 :             :                 {
    2935                 :    11587696 :                   int last_reload = (lra_reg_info[ORIGINAL_REGNO
    2936                 :    11587696 :                                                   (operand_reg[nop])]
    2937                 :    11587696 :                                      .last_reload);
    2938                 :             : 
    2939                 :             :                   /* The value of reload_sum has sense only if we
    2940                 :             :                      process insns in their order.  It happens only on
    2941                 :             :                      the first constraints sub-pass when we do most of
    2942                 :             :                      reload work.  */
    2943                 :    11587696 :                   if (lra_constraint_iter == 1 && last_reload > bb_reload_num)
    2944                 :     2568399 :                     reload_sum += last_reload - bb_reload_num;
    2945                 :             :                 }
    2946                 :             :               /* If this is a constant that is reloaded into the
    2947                 :             :                  desired class by copying it to memory first, count
    2948                 :             :                  that as another reload.  This is consistent with
    2949                 :             :                  other code and is required to avoid choosing another
    2950                 :             :                  alternative when the constant is moved into memory.
    2951                 :             :                  Note that the test here is precisely the same as in
    2952                 :             :                  the code below that calls force_const_mem.  */
    2953                 :   267527560 :               if (CONST_POOL_OK_P (mode, op)
    2954                 :   218448604 :                   && ((targetm.preferred_reload_class
    2955                 :    49078956 :                        (op, this_alternative) == NO_REGS)
    2956                 :    47580672 :                       || no_input_reloads_p))
    2957                 :             :                 {
    2958                 :     1498284 :                   const_to_mem = 1;
    2959                 :     1498284 :                   if (! no_regs_p)
    2960                 :             :                     {
    2961                 :      766101 :                       if (lra_dump_file != NULL)
    2962                 :           0 :                         fprintf
    2963                 :           0 :                           (lra_dump_file,
    2964                 :             :                            "            %d Constant reload through memory: "
    2965                 :             :                            "losers++\n", nop);
    2966                 :      766101 :                       losers++;
    2967                 :             :                     }
    2968                 :             :                 }
    2969                 :             : 
    2970                 :             :               /* Alternative loses if it requires a type of reload not
    2971                 :             :                  permitted for this insn.  We can always reload
    2972                 :             :                  objects with a REG_UNUSED note.  */
    2973                 :   169369648 :               if ((curr_static_id->operand[nop].type != OP_IN
    2974                 :    81306167 :                    && no_output_reloads_p
    2975                 :           0 :                    && ! find_reg_note (curr_insn, REG_UNUSED, op))
    2976                 :   169369648 :                   || (curr_static_id->operand[nop].type != OP_OUT
    2977                 :    88063767 :                       && no_input_reloads_p && ! const_to_mem)
    2978                 :   338739296 :                   || (this_alternative_matches >= 0
    2979                 :    40261356 :                       && (no_input_reloads_p
    2980                 :    40261356 :                           || (no_output_reloads_p
    2981                 :           0 :                               && (curr_static_id->operand
    2982                 :           0 :                                   [this_alternative_matches].type != OP_IN)
    2983                 :           0 :                               && ! find_reg_note (curr_insn, REG_UNUSED,
    2984                 :             :                                                   no_subreg_reg_operand
    2985                 :           0 :                                                   [this_alternative_matches])))))
    2986                 :             :                 {
    2987                 :           0 :                   if (lra_dump_file != NULL)
    2988                 :           0 :                     fprintf
    2989                 :           0 :                       (lra_dump_file,
    2990                 :             :                        "            No input/output reload -- refuse\n");
    2991                 :           0 :                   goto fail;
    2992                 :             :                 }
    2993                 :             : 
    2994                 :             :               /* Alternative loses if it required class pseudo cannot
    2995                 :             :                  hold value of required mode.  Such insns can be
    2996                 :             :                  described by insn definitions with mode iterators.  */
    2997                 :   169369648 :               if (GET_MODE (*curr_id->operand_loc[nop]) != VOIDmode
    2998                 :   121671624 :                   && ! hard_reg_set_empty_p (this_alternative_set)
    2999                 :             :                   /* It is common practice for constraints to use a
    3000                 :             :                      class which does not have actually enough regs to
    3001                 :             :                      hold the value (e.g. x86 AREG for mode requiring
    3002                 :             :                      more one general reg).  Therefore we have 2
    3003                 :             :                      conditions to check that the reload pseudo cannot
    3004                 :             :                      hold the mode value.  */
    3005                 :   112923463 :                   && (!targetm.hard_regno_mode_ok
    3006                 :   112923463 :                       (ira_class_hard_regs[this_alternative][0],
    3007                 :             :                        GET_MODE (*curr_id->operand_loc[nop])))
    3008                 :             :                   /* The above condition is not enough as the first
    3009                 :             :                      reg in ira_class_hard_regs can be not aligned for
    3010                 :             :                      multi-words mode values.  */
    3011                 :   169369648 :                   && (prohibited_class_reg_set_mode_p
    3012                 :           0 :                       (this_alternative, this_alternative_set,
    3013                 :           0 :                        GET_MODE (*curr_id->operand_loc[nop]))))
    3014                 :             :                 {
    3015                 :           0 :                   if (lra_dump_file != NULL)
    3016                 :           0 :                     fprintf (lra_dump_file,
    3017                 :             :                              "            reload pseudo for op %d "
    3018                 :             :                              "cannot hold the mode value -- refuse\n",
    3019                 :             :                              nop);
    3020                 :           0 :                   goto fail;
    3021                 :             :                 }
    3022                 :             : 
    3023                 :             :               /* Check strong discouragement of reload of non-constant
    3024                 :             :                  into class THIS_ALTERNATIVE.  */
    3025                 :   120290692 :               if (! CONSTANT_P (op) && ! no_regs_p
    3026                 :   281012143 :                   && (targetm.preferred_reload_class
    3027                 :   111642495 :                       (op, this_alternative) == NO_REGS
    3028                 :   103242047 :                       || (curr_static_id->operand[nop].type == OP_OUT
    3029                 :    70523172 :                           && (targetm.preferred_output_reload_class
    3030                 :    70523172 :                               (op, this_alternative) == NO_REGS))))
    3031                 :             :                 {
    3032                 :    12926365 :                   if (offmemok && REG_P (op))
    3033                 :             :                     {
    3034                 :      778327 :                       if (lra_dump_file != NULL)
    3035                 :           0 :                         fprintf
    3036                 :           0 :                           (lra_dump_file,
    3037                 :             :                            "            %d Spill pseudo into memory: reject+=3\n",
    3038                 :             :                            nop);
    3039                 :      778327 :                       reject += 3;
    3040                 :             :                     }
    3041                 :             :                   else
    3042                 :             :                     {
    3043                 :    12148038 :                       if (lra_dump_file != NULL)
    3044                 :           0 :                         fprintf
    3045                 :           0 :                           (lra_dump_file,
    3046                 :             :                            "            %d Non-prefered reload: reject+=%d\n",
    3047                 :             :                            nop, LRA_MAX_REJECT);
    3048                 :    12148038 :                       reject += LRA_MAX_REJECT;
    3049                 :             :                     }
    3050                 :             :                 }
    3051                 :             : 
    3052                 :   169369648 :               if (! (MEM_P (op) && offmemok)
    3053                 :   169369576 :                   && ! (const_to_mem && constmemok))
    3054                 :             :                 {
    3055                 :             :                   /* We prefer to reload pseudos over reloading other
    3056                 :             :                      things, since such reloads may be able to be
    3057                 :             :                      eliminated later.  So bump REJECT in other cases.
    3058                 :             :                      Don't do this in the case where we are forcing a
    3059                 :             :                      constant into memory and it will then win since
    3060                 :             :                      we don't want to have a different alternative
    3061                 :             :                      match then.  */
    3062                 :   168521420 :                   if (! (REG_P (op) && REGNO (op) >= FIRST_PSEUDO_REGISTER))
    3063                 :             :                     {
    3064                 :   118853670 :                       if (lra_dump_file != NULL)
    3065                 :        1709 :                         fprintf
    3066                 :        1709 :                           (lra_dump_file,
    3067                 :             :                            "            %d Non-pseudo reload: reject+=2\n",
    3068                 :             :                            nop);
    3069                 :   118853670 :                       reject += 2;
    3070                 :             :                     }
    3071                 :             : 
    3072                 :   168521420 :                   if (! no_regs_p)
    3073                 :   159873267 :                     reload_nregs
    3074                 :   159873267 :                       += ira_reg_class_max_nregs[this_alternative][mode];
    3075                 :             : 
    3076                 :   168521420 :                   if (SMALL_REGISTER_CLASS_P (this_alternative))
    3077                 :             :                     {
    3078                 :      922155 :                       if (lra_dump_file != NULL)
    3079                 :          69 :                         fprintf
    3080                 :          69 :                           (lra_dump_file,
    3081                 :             :                            "            %d Small class reload: reject+=%d\n",
    3082                 :             :                            nop, LRA_LOSER_COST_FACTOR / 2);
    3083                 :      922155 :                       reject += LRA_LOSER_COST_FACTOR / 2;
    3084                 :             :                     }
    3085                 :             :                 }
    3086                 :             : 
    3087                 :             :               /* We are trying to spill pseudo into memory.  It is
    3088                 :             :                  usually more costly than moving to a hard register
    3089                 :             :                  although it might takes the same number of
    3090                 :             :                  reloads.
    3091                 :             : 
    3092                 :             :                  Non-pseudo spill may happen also.  Suppose a target allows both
    3093                 :             :                  register and memory in the operand constraint alternatives,
    3094                 :             :                  then it's typical that an eliminable register has a substition
    3095                 :             :                  of "base + offset" which can either be reloaded by a simple
    3096                 :             :                  "new_reg <= base + offset" which will match the register
    3097                 :             :                  constraint, or a similar reg addition followed by further spill
    3098                 :             :                  to and reload from memory which will match the memory
    3099                 :             :                  constraint, but this memory spill will be much more costly
    3100                 :             :                  usually.
    3101                 :             : 
    3102                 :             :                  Code below increases the reject for both pseudo and non-pseudo
    3103                 :             :                  spill.  */
    3104                 :   169369648 :               if (no_regs_p
    3105                 :     9380380 :                   && !(MEM_P (op) && offmemok)
    3106                 :     9380336 :                   && !(REG_P (op) && hard_regno[nop] < 0))
    3107                 :             :                 {
    3108                 :     8228214 :                   if (lra_dump_file != NULL)
    3109                 :          13 :                     fprintf
    3110                 :          19 :                       (lra_dump_file,
    3111                 :             :                        "            %d Spill %spseudo into memory: reject+=3\n",
    3112                 :             :                        nop, REG_P (op) ? "" : "Non-");
    3113                 :     8228214 :                   reject += 3;
    3114                 :     8228214 :                   if (VECTOR_MODE_P (mode))
    3115                 :             :                     {
    3116                 :             :                       /* Spilling vectors into memory is usually more
    3117                 :             :                          costly as they contain big values.  */
    3118                 :      379088 :                       if (lra_dump_file != NULL)
    3119                 :           0 :                         fprintf
    3120                 :           0 :                           (lra_dump_file,
    3121                 :             :                            "            %d Spill vector pseudo: reject+=2\n",
    3122                 :             :                            nop);
    3123                 :      379088 :                       reject += 2;
    3124                 :             :                     }
    3125                 :             :                 }
    3126                 :             : 
    3127                 :             :               /* When we use an operand requiring memory in given
    3128                 :             :                  alternative, the insn should write *and* read the
    3129                 :             :                  value to/from memory it is costly in comparison with
    3130                 :             :                  an insn alternative which does not use memory
    3131                 :             :                  (e.g. register or immediate operand).  We exclude
    3132                 :             :                  memory operand for such case as we can satisfy the
    3133                 :             :                  memory constraints by reloading address.  */
    3134                 :     9380380 :               if (no_regs_p && offmemok && !MEM_P (op))
    3135                 :             :                 {
    3136                 :     9380022 :                   if (lra_dump_file != NULL)
    3137                 :          25 :                     fprintf
    3138                 :          25 :                       (lra_dump_file,
    3139                 :             :                        "            Using memory insn operand %d: reject+=3\n",
    3140                 :             :                        nop);
    3141                 :     9380022 :                   reject += 3;
    3142                 :             :                 }
    3143                 :             : 
    3144                 :             :               /* If reload requires moving value through secondary
    3145                 :             :                  memory, it will need one more insn at least.  */
    3146                 :   169369648 :               if (this_alternative != NO_REGS
    3147                 :   159989068 :                   && REG_P (op) && (cl = get_reg_class (REGNO (op))) != NO_REGS
    3148                 :   205648979 :                   && ((curr_static_id->operand[nop].type != OP_OUT
    3149                 :    20025737 :                        && targetm.secondary_memory_needed (mode, cl,
    3150                 :             :                                                            this_alternative))
    3151                 :    32934531 :                       || (curr_static_id->operand[nop].type != OP_IN
    3152                 :    16253774 :                           && (targetm.secondary_memory_needed
    3153                 :    16253774 :                               (mode, this_alternative, cl)))))
    3154                 :             :                 {
    3155                 :    11226676 :                   if (lra_dump_file != NULL)
    3156                 :          16 :                     fprintf
    3157                 :          16 :                       (lra_dump_file,
    3158                 :             :                        "            %d Secondary memory reload needed: "
    3159                 :             :                        "losers++\n", nop);
    3160                 :    11226676 :                   losers++;
    3161                 :             :                 }
    3162                 :             : 
    3163                 :   169369648 :               if (MEM_P (op) && offmemok)
    3164                 :          72 :                 addr_losers++;
    3165                 :             :               else
    3166                 :             :                 {
    3167                 :             :                   /* Input reloads can be inherited more often than
    3168                 :             :                      output reloads can be removed, so penalize output
    3169                 :             :                      reloads.  */
    3170                 :   169369576 :                   if (!REG_P (op) || curr_static_id->operand[nop].type != OP_IN)
    3171                 :             :                     {
    3172                 :   142230635 :                       if (lra_dump_file != NULL)
    3173                 :        1771 :                         fprintf
    3174                 :        1771 :                           (lra_dump_file,
    3175                 :             :                            "            %d Non input pseudo reload: reject++\n",
    3176                 :             :                            nop);
    3177                 :   142230635 :                       reject++;
    3178                 :             :                     }
    3179                 :             : 
    3180                 :   169369576 :                   if (curr_static_id->operand[nop].type == OP_INOUT)
    3181                 :             :                     {
    3182                 :         286 :                       if (lra_dump_file != NULL)
    3183                 :           0 :                         fprintf
    3184                 :           0 :                           (lra_dump_file,
    3185                 :             :                            "            %d Input/Output reload: reject+=%d\n",
    3186                 :             :                            nop, LRA_LOSER_COST_FACTOR);
    3187                 :         286 :                       reject += LRA_LOSER_COST_FACTOR;
    3188                 :             :                     }
    3189                 :             :                 }
    3190                 :             :             }
    3191                 :             : 
    3192                 :   450864135 :           if (early_clobber_p && ! scratch_p)
    3193                 :             :             {
    3194                 :      161153 :               if (lra_dump_file != NULL)
    3195                 :           4 :                 fprintf (lra_dump_file,
    3196                 :             :                          "            %d Early clobber: reject++\n", nop);
    3197                 :      161153 :               reject++;
    3198                 :             :             }
    3199                 :             :           /* ??? We check early clobbers after processing all operands
    3200                 :             :              (see loop below) and there we update the costs more.
    3201                 :             :              Should we update the cost (may be approximately) here
    3202                 :             :              because of early clobber register reloads or it is a rare
    3203                 :             :              or non-important thing to be worth to do it.  */
    3204                 :   901728270 :           overall = (losers * LRA_LOSER_COST_FACTOR + reject
    3205                 :   450864135 :                      - (addr_losers == losers ? static_reject : 0));
    3206                 :   450864135 :           if ((best_losers == 0 || losers != 0) && best_overall < overall)
    3207                 :             :             {
    3208                 :    72756527 :               if (lra_dump_file != NULL)
    3209                 :        1089 :                 fprintf (lra_dump_file,
    3210                 :             :                          "            overall=%d,losers=%d -- refuse\n",
    3211                 :             :                          overall, losers);
    3212                 :    72756527 :               goto fail;
    3213                 :             :             }
    3214                 :             : 
    3215                 :   378107608 :           if (update_and_check_small_class_inputs (nop, nalt,
    3216                 :             :                                                    this_alternative))
    3217                 :             :             {
    3218                 :           0 :               if (lra_dump_file != NULL)
    3219                 :           0 :                 fprintf (lra_dump_file,
    3220                 :             :                          "            not enough small class regs -- refuse\n");
    3221                 :           0 :               goto fail;
    3222                 :             :             }
    3223                 :   378107608 :           curr_alt[nop] = this_alternative;
    3224                 :   378107608 :           curr_alt_set[nop] = this_alternative_set;
    3225                 :   378107608 :           curr_alt_exclude_start_hard_regs[nop]
    3226                 :   378107608 :             = this_alternative_exclude_start_hard_regs;
    3227                 :   378107608 :           curr_alt_win[nop] = this_alternative_win;
    3228                 :   378107608 :           curr_alt_match_win[nop] = this_alternative_match_win;
    3229                 :   378107608 :           curr_alt_offmemok[nop] = this_alternative_offmemok;
    3230                 :   378107608 :           curr_alt_matches[nop] = this_alternative_matches;
    3231                 :             : 
    3232                 :   378107608 :           if (this_alternative_matches >= 0
    3233                 :   378107608 :               && !did_match && !this_alternative_win)
    3234                 :    12763753 :             curr_alt_win[this_alternative_matches] = false;
    3235                 :             : 
    3236                 :   378107608 :           if (early_clobber_p && operand_reg[nop] != NULL_RTX)
    3237                 :      167369 :             early_clobbered_nops[early_clobbered_regs_num++] = nop;
    3238                 :             :         }
    3239                 :             : 
    3240                 :   125881262 :       if (curr_insn_set != NULL_RTX && n_operands == 2
    3241                 :             :           /* Prevent processing non-move insns.  */
    3242                 :    98083305 :           && (GET_CODE (SET_SRC (curr_insn_set)) == SUBREG
    3243                 :    96108133 :               || SET_SRC (curr_insn_set) == no_subreg_reg_operand[1])
    3244                 :   217225774 :           && ((! curr_alt_win[0] && ! curr_alt_win[1]
    3245                 :     5800338 :                && REG_P (no_subreg_reg_operand[0])
    3246                 :     3033758 :                && REG_P (no_subreg_reg_operand[1])
    3247                 :     1192127 :                && (reg_in_class_p (no_subreg_reg_operand[0], curr_alt[1])
    3248                 :      995012 :                    || reg_in_class_p (no_subreg_reg_operand[1], curr_alt[0])))
    3249                 :    87098534 :               || (! curr_alt_win[0] && curr_alt_win[1]
    3250                 :    25769711 :                   && REG_P (no_subreg_reg_operand[1])
    3251                 :             :                   /* Check that we reload memory not the memory
    3252                 :             :                      address.  */
    3253                 :    14705202 :                   && ! (curr_alt_offmemok[0]
    3254                 :      424129 :                         && MEM_P (no_subreg_reg_operand[0]))
    3255                 :    14705202 :                   && reg_in_class_p (no_subreg_reg_operand[1], curr_alt[0]))
    3256                 :    73804596 :               || (curr_alt_win[0] && ! curr_alt_win[1]
    3257                 :     9504212 :                   && REG_P (no_subreg_reg_operand[0])
    3258                 :             :                   /* Check that we reload memory not the memory
    3259                 :             :                      address.  */
    3260                 :     7111934 :                   && ! (curr_alt_offmemok[1]
    3261                 :      954114 :                         && MEM_P (no_subreg_reg_operand[1]))
    3262                 :     7111932 :                   && reg_in_class_p (no_subreg_reg_operand[0], curr_alt[1])
    3263                 :   118829259 :                   && (! CONST_POOL_OK_P (curr_operand_mode[1],
    3264                 :             :                                          no_subreg_reg_operand[1])
    3265                 :     2480173 :                       || (targetm.preferred_reload_class
    3266                 :     2480173 :                           (no_subreg_reg_operand[1],
    3267                 :             :                            (enum reg_class) curr_alt[1]) != NO_REGS))
    3268                 :             :                   /* If it is a result of recent elimination in move
    3269                 :             :                      insn we can transform it into an add still by
    3270                 :             :                      using this alternative.  */
    3271                 :     6215661 :                   && GET_CODE (no_subreg_reg_operand[1]) != PLUS
    3272                 :             :                   /* Likewise if the source has been replaced with an
    3273                 :             :                      equivalent value.  This only happens once -- the reload
    3274                 :             :                      will use the equivalent value instead of the register it
    3275                 :             :                      replaces -- so there should be no danger of cycling.  */
    3276                 :     5768791 :                   && !equiv_substition_p[1])))
    3277                 :             :         {
    3278                 :             :           /* We have a move insn and a new reload insn will be similar
    3279                 :             :              to the current insn.  We should avoid such situation as
    3280                 :             :              it results in LRA cycling.  */
    3281                 :    19537318 :           if (lra_dump_file != NULL)
    3282                 :         227 :             fprintf (lra_dump_file,
    3283                 :             :                      "            Cycle danger: overall += LRA_MAX_REJECT\n");
    3284                 :    19537318 :           overall += LRA_MAX_REJECT;
    3285                 :             :         }
    3286                 :   129625118 :       if (all_this_alternative != NO_REGS
    3287                 :   110625148 :           && !SMALL_REGISTER_CLASS_P (all_this_alternative)
    3288                 :   109745103 :           && all_used_nregs != 0 && all_reload_nregs != 0
    3289                 :   129625118 :           && (all_used_nregs + all_reload_nregs + 1
    3290                 :     3737543 :               >= ira_class_hard_regs_num[all_this_alternative]))
    3291                 :             :         {
    3292                 :         301 :           if (lra_dump_file != NULL)
    3293                 :           0 :             fprintf
    3294                 :           0 :               (lra_dump_file,
    3295                 :             :                "            Register starvation: overall += LRA_MAX_REJECT"
    3296                 :             :                "(class=%s,avail=%d,used=%d,reload=%d)\n",
    3297                 :             :                reg_class_names[all_this_alternative],
    3298                 :             :                ira_class_hard_regs_num[all_this_alternative],
    3299                 :             :                all_used_nregs, all_reload_nregs);
    3300                 :         301 :           overall += LRA_MAX_REJECT;
    3301                 :             :         }
    3302                 :   129788880 :       ok_p = true;
    3303                 :             :       curr_alt_dont_inherit_ops_num = 0;
    3304                 :   129788880 :       for (nop = 0; nop < early_clobbered_regs_num; nop++)
    3305                 :             :         {
    3306                 :      163763 :           int i, j, clobbered_hard_regno, first_conflict_j, last_conflict_j;
    3307                 :      163763 :           HARD_REG_SET temp_set;
    3308                 :             : 
    3309                 :      163763 :           i = early_clobbered_nops[nop];
    3310                 :      163763 :           if ((! curr_alt_win[i] && ! curr_alt_match_win[i])
    3311                 :      123786 :               || hard_regno[i] < 0)
    3312                 :      163127 :             continue;
    3313                 :      122048 :           lra_assert (operand_reg[i] != NULL_RTX);
    3314                 :             :           clobbered_hard_regno = hard_regno[i];
    3315                 :      122048 :           CLEAR_HARD_REG_SET (temp_set);
    3316                 :      122048 :           add_to_hard_reg_set (&temp_set, GET_MODE (*curr_id->operand_loc[i]),
    3317                 :             :                                clobbered_hard_regno);
    3318                 :      122048 :           first_conflict_j = last_conflict_j = -1;
    3319                 :      618051 :           for (j = 0; j < n_operands; j++)
    3320                 :      496004 :             if (j == i
    3321                 :             :                 /* We don't want process insides of match_operator and
    3322                 :             :                    match_parallel because otherwise we would process
    3323                 :             :                    their operands once again generating a wrong
    3324                 :             :                    code.  */
    3325                 :      373956 :                 || curr_static_id->operand[j].is_operator)
    3326                 :      124265 :               continue;
    3327                 :      371739 :             else if ((curr_alt_matches[j] == i && curr_alt_match_win[j])
    3328                 :      353227 :                      || (curr_alt_matches[i] == j && curr_alt_match_win[i]))
    3329                 :       18512 :               continue;
    3330                 :             :             /* If we don't reload j-th operand, check conflicts.  */
    3331                 :      116819 :             else if ((curr_alt_win[j] || curr_alt_match_win[j])
    3332                 :      412185 :                      && uses_hard_regs_p (*curr_id->operand_loc[j], temp_set))
    3333                 :             :               {
    3334                 :        1141 :                 if (first_conflict_j < 0)
    3335                 :         636 :                   first_conflict_j = j;
    3336                 :        1141 :                 last_conflict_j = j;
    3337                 :             :                 /* Both the earlyclobber operand and conflicting operand
    3338                 :             :                    cannot both be user defined hard registers.  */
    3339                 :        1141 :                 if (HARD_REGISTER_P (operand_reg[i])
    3340                 :           1 :                     && REG_USERVAR_P (operand_reg[i])
    3341                 :           1 :                     && operand_reg[j] != NULL_RTX
    3342                 :           1 :                     && HARD_REGISTER_P (operand_reg[j])
    3343                 :        1142 :                     && REG_USERVAR_P (operand_reg[j]))
    3344                 :             :                   {
    3345                 :             :                     /* For asm, let curr_insn_transform diagnose it.  */
    3346                 :           1 :                     if (INSN_CODE (curr_insn) < 0)
    3347                 :           1 :                       return false;
    3348                 :           0 :                     fatal_insn ("unable to generate reloads for "
    3349                 :             :                                 "impossible constraints:", curr_insn);
    3350                 :             :                   }
    3351                 :             :               }
    3352                 :      122047 :           if (last_conflict_j < 0)
    3353                 :      121412 :             continue;
    3354                 :             : 
    3355                 :             :           /* If an earlyclobber operand conflicts with another non-matching
    3356                 :             :              operand (ie, they have been assigned the same hard register),
    3357                 :             :              then it is better to reload the other operand, as there may
    3358                 :             :              exist yet another operand with a matching constraint associated
    3359                 :             :              with the earlyclobber operand.  However, if one of the operands
    3360                 :             :              is an explicit use of a hard register, then we must reload the
    3361                 :             :              other non-hard register operand.  */
    3362                 :         635 :           if (HARD_REGISTER_P (operand_reg[i])
    3363                 :         635 :               || (first_conflict_j == last_conflict_j
    3364                 :         130 :                   && operand_reg[last_conflict_j] != NULL_RTX
    3365                 :          61 :                   && !curr_alt_match_win[last_conflict_j]
    3366                 :          61 :                   && !HARD_REGISTER_P (operand_reg[last_conflict_j])))
    3367                 :             :             {
    3368                 :          61 :               curr_alt_win[last_conflict_j] = false;
    3369                 :          61 :               curr_alt_dont_inherit_ops[curr_alt_dont_inherit_ops_num++]
    3370                 :          61 :                 = last_conflict_j;
    3371                 :          61 :               losers++;
    3372                 :          61 :               if (lra_dump_file != NULL)
    3373                 :           0 :                 fprintf
    3374                 :           0 :                   (lra_dump_file,
    3375                 :             :                    "            %d Conflict early clobber reload: losers++\n",
    3376                 :             :                    i);
    3377                 :             :             }
    3378                 :             :           else
    3379                 :             :             {
    3380                 :             :               /* We need to reload early clobbered register and the
    3381                 :             :                  matched registers.  */
    3382                 :        2864 :               for (j = 0; j < n_operands; j++)
    3383                 :        2290 :                 if (curr_alt_matches[j] == i)
    3384                 :             :                   {
    3385                 :           2 :                     curr_alt_match_win[j] = false;
    3386                 :           2 :                     losers++;
    3387                 :           2 :                     if (lra_dump_file != NULL)
    3388                 :           0 :                       fprintf
    3389                 :           0 :                         (lra_dump_file,
    3390                 :             :                          "            %d Matching conflict early clobber "
    3391                 :             :                          "reloads: losers++\n",
    3392                 :             :                          j);
    3393                 :           2 :                     overall += LRA_LOSER_COST_FACTOR;
    3394                 :             :                   }
    3395                 :         574 :               if (! curr_alt_match_win[i])
    3396                 :         574 :                 curr_alt_dont_inherit_ops[curr_alt_dont_inherit_ops_num++] = i;
    3397                 :             :               else
    3398                 :             :                 {
    3399                 :             :                   /* Remember pseudos used for match reloads are never
    3400                 :             :                      inherited.  */
    3401                 :           0 :                   lra_assert (curr_alt_matches[i] >= 0);
    3402                 :           0 :                   curr_alt_win[curr_alt_matches[i]] = false;
    3403                 :             :                 }
    3404                 :         574 :               curr_alt_win[i] = curr_alt_match_win[i] = false;
    3405                 :         574 :               losers++;
    3406                 :         574 :               if (lra_dump_file != NULL)
    3407                 :           0 :                 fprintf
    3408                 :           0 :                   (lra_dump_file,
    3409                 :             :                    "            %d Matched conflict early clobber reloads: "
    3410                 :             :                    "losers++\n",
    3411                 :             :                    i);
    3412                 :             :             }
    3413                 :             :           /* Early clobber was already reflected in REJECT. */
    3414                 :         635 :           if (!matching_early_clobber[i])
    3415                 :             :             {
    3416                 :         635 :               lra_assert (reject > 0);
    3417                 :         635 :               reject--;
    3418                 :         635 :               matching_early_clobber[i] = 1;
    3419                 :             :             }
    3420                 :         635 :           overall += LRA_LOSER_COST_FACTOR - 1;
    3421                 :             :         }
    3422                 :   129625117 :       if (lra_dump_file != NULL)
    3423                 :        1772 :         fprintf (lra_dump_file, "          overall=%d,losers=%d,rld_nregs=%d\n",
    3424                 :             :                  overall, losers, reload_nregs);
    3425                 :             : 
    3426                 :             :       /* If this alternative can be made to work by reloading, and it
    3427                 :             :          needs less reloading than the others checked so far, record
    3428                 :             :          it as the chosen goal for reloading.  */
    3429                 :   129625117 :       if ((best_losers != 0 && losers == 0)
    3430                 :    57619309 :           || (((best_losers == 0 && losers == 0)
    3431                 :    56678239 :                || (best_losers != 0 && losers != 0))
    3432                 :    57619309 :               && (best_overall > overall
    3433                 :    14878843 :                   || (best_overall == overall
    3434                 :             :                       /* If the cost of the reloads is the same,
    3435                 :             :                          prefer alternative which requires minimal
    3436                 :             :                          number of reload regs.  */
    3437                 :    10792869 :                       && (reload_nregs < best_reload_nregs
    3438                 :    10690124 :                           || (reload_nregs == best_reload_nregs
    3439                 :    10647368 :                               && (best_reload_sum < reload_sum
    3440                 :    10629109 :                                   || (best_reload_sum == reload_sum
    3441                 :    10605836 :                                       && nalt < goal_alt_number))))))))
    3442                 :             :         {
    3443                 :   374041861 :           for (nop = 0; nop < n_operands; nop++)
    3444                 :             :             {
    3445                 :   258952015 :               goal_alt_win[nop] = curr_alt_win[nop];
    3446                 :   258952015 :               goal_alt_match_win[nop] = curr_alt_match_win[nop];
    3447                 :   258952015 :               goal_alt_matches[nop] = curr_alt_matches[nop];
    3448                 :   258952015 :               goal_alt[nop] = curr_alt[nop];
    3449                 :   258952015 :               goal_alt_exclude_start_hard_regs[nop]
    3450                 :   258952015 :                 = curr_alt_exclude_start_hard_regs[nop];
    3451                 :   258952015 :               goal_alt_offmemok[nop] = curr_alt_offmemok[nop];
    3452                 :             :             }
    3453                 :   115089846 :           goal_alt_dont_inherit_ops_num = curr_alt_dont_inherit_ops_num;
    3454                 :   115089846 :           goal_reuse_alt_p = curr_reuse_alt_p;
    3455                 :   115090468 :           for (nop = 0; nop < curr_alt_dont_inherit_ops_num; nop++)
    3456                 :         622 :             goal_alt_dont_inherit_ops[nop] = curr_alt_dont_inherit_ops[nop];
    3457                 :   115089846 :           goal_alt_swapped = curr_swapped;
    3458                 :   115089846 :           goal_alt_out_sp_reload_p = curr_alt_out_sp_reload_p;
    3459                 :   115089846 :           best_overall = overall;
    3460                 :   115089846 :           best_losers = losers;
    3461                 :   115089846 :           best_reload_nregs = reload_nregs;
    3462                 :   115089846 :           best_reload_sum = reload_sum;
    3463                 :   115089846 :           goal_alt_number = nalt;
    3464                 :             :         }
    3465                 :   129625117 :       if (losers == 0 && !curr_alt_class_change_p)
    3466                 :             :         /* Everything is satisfied.  Do not process alternatives
    3467                 :             :            anymore.  */
    3468                 :             :         break;
    3469                 :    56693622 :     fail:
    3470                 :   173981693 :       ;
    3471                 :             :     }
    3472                 :             :   return ok_p;
    3473                 :             : }
    3474                 :             : 
    3475                 :             : /* Make reload base reg from address AD.  */
    3476                 :             : static rtx
    3477                 :          46 : base_to_reg (struct address_info *ad)
    3478                 :             : {
    3479                 :          46 :   enum reg_class cl;
    3480                 :          46 :   int code = -1;
    3481                 :          46 :   rtx new_inner = NULL_RTX;
    3482                 :          46 :   rtx new_reg = NULL_RTX;
    3483                 :          46 :   rtx_insn *insn;
    3484                 :          46 :   rtx_insn *last_insn = get_last_insn();
    3485                 :             : 
    3486                 :          46 :   lra_assert (ad->disp == ad->disp_term);
    3487                 :          46 :   cl = base_reg_class (ad->mode, ad->as, ad->base_outer_code,
    3488                 :             :                        get_index_code (ad));
    3489                 :          46 :   new_reg = lra_create_new_reg (GET_MODE (*ad->base), NULL_RTX, cl, NULL,
    3490                 :             :                                 "base");
    3491                 :          46 :   new_inner = simplify_gen_binary (PLUS, GET_MODE (new_reg), new_reg,
    3492                 :          46 :                                    ad->disp_term == NULL
    3493                 :             :                                    ? const0_rtx
    3494                 :             :                                    : *ad->disp_term);
    3495                 :          46 :   if (!valid_address_p (ad->mode, new_inner, ad->as))
    3496                 :             :     return NULL_RTX;
    3497                 :           0 :   insn = emit_insn (gen_rtx_SET (new_reg, *ad->base));
    3498                 :           0 :   code = recog_memoized (insn);
    3499                 :           0 :   if (code < 0)
    3500                 :             :     {
    3501                 :           0 :       delete_insns_since (last_insn);
    3502                 :           0 :       return NULL_RTX;
    3503                 :             :     }
    3504                 :             : 
    3505                 :             :   return new_inner;
    3506                 :             : }
    3507                 :             : 
    3508                 :             : /* Make reload base reg + DISP from address AD.  Return the new pseudo.  */
    3509                 :             : static rtx
    3510                 :          87 : base_plus_disp_to_reg (struct address_info *ad, rtx disp)
    3511                 :             : {
    3512                 :          87 :   enum reg_class cl;
    3513                 :          87 :   rtx new_reg;
    3514                 :             : 
    3515                 :          87 :   lra_assert (ad->base == ad->base_term);
    3516                 :          87 :   cl = base_reg_class (ad->mode, ad->as, ad->base_outer_code,
    3517                 :             :                        get_index_code (ad));
    3518                 :          87 :   new_reg = lra_create_new_reg (GET_MODE (*ad->base_term), NULL_RTX, cl, NULL,
    3519                 :             :                                 "base + disp");
    3520                 :          87 :   lra_emit_add (new_reg, *ad->base_term, disp);
    3521                 :          87 :   return new_reg;
    3522                 :             : }
    3523                 :             : 
    3524                 :             : /* Make reload of index part of address AD.  Return the new
    3525                 :             :    pseudo.  */
    3526                 :             : static rtx
    3527                 :           0 : index_part_to_reg (struct address_info *ad, enum reg_class index_class)
    3528                 :             : {
    3529                 :           0 :   rtx new_reg;
    3530                 :             : 
    3531                 :           0 :   new_reg = lra_create_new_reg (GET_MODE (*ad->index), NULL_RTX,
    3532                 :             :                                 index_class, NULL, "index term");
    3533                 :           0 :   expand_mult (GET_MODE (*ad->index), *ad->index_term,
    3534                 :             :                GEN_INT (get_index_scale (ad)), new_reg, 1);
    3535                 :           0 :   return new_reg;
    3536                 :             : }
    3537                 :             : 
    3538                 :             : /* Return true if we can add a displacement to address AD, even if that
    3539                 :             :    makes the address invalid.  The fix-up code requires any new address
    3540                 :             :    to be the sum of the BASE_TERM, INDEX and DISP_TERM fields.  */
    3541                 :             : static bool
    3542                 :        9846 : can_add_disp_p (struct address_info *ad)
    3543                 :             : {
    3544                 :        9846 :   return (!ad->autoinc_p
    3545                 :        9846 :           && ad->segment == NULL
    3546                 :        9846 :           && ad->base == ad->base_term
    3547                 :       19692 :           && ad->disp == ad->disp_term);
    3548                 :             : }
    3549                 :             : 
    3550                 :             : /* Make equiv substitution in address AD.  Return true if a substitution
    3551                 :             :    was made.  */
    3552                 :             : static bool
    3553                 :    37449872 : equiv_address_substitution (struct address_info *ad)
    3554                 :             : {
    3555                 :    37449872 :   rtx base_reg, new_base_reg, index_reg, new_index_reg, *base_term, *index_term;
    3556                 :    37449872 :   poly_int64 disp;
    3557                 :    37449872 :   HOST_WIDE_INT scale;
    3558                 :    37449872 :   bool change_p;
    3559                 :             : 
    3560                 :    37449872 :   base_term = strip_subreg (ad->base_term);
    3561                 :        7039 :   if (base_term == NULL)
    3562                 :             :     base_reg = new_base_reg = NULL_RTX;
    3563                 :             :   else
    3564                 :             :     {
    3565                 :    31467306 :       base_reg = *base_term;
    3566                 :    31467306 :       new_base_reg = get_equiv_with_elimination (base_reg, curr_insn);
    3567                 :             :     }
    3568                 :    37449872 :   index_term = strip_subreg (ad->index_term);
    3569                 :        6061 :   if (index_term == NULL)
    3570                 :             :     index_reg = new_index_reg = NULL_RTX;
    3571                 :             :   else
    3572                 :             :     {
    3573                 :     1597566 :       index_reg = *index_term;
    3574                 :     1597566 :       new_index_reg = get_equiv_with_elimination (index_reg, curr_insn);
    3575                 :             :     }
    3576                 :    37449872 :   if (base_reg == new_base_reg && index_reg == new_index_reg)
    3577                 :             :     return false;
    3578                 :      116494 :   disp = 0;
    3579                 :      116494 :   change_p = false;
    3580                 :      116494 :   if (lra_dump_file != NULL)
    3581                 :             :     {
    3582                 :           0 :       fprintf (lra_dump_file, "Changing address in insn %d ",
    3583                 :           0 :                INSN_UID (curr_insn));
    3584                 :           0 :       dump_value_slim (lra_dump_file, *ad->outer, 1);
    3585                 :             :     }
    3586                 :      116494 :   if (base_reg != new_base_reg)
    3587                 :             :     {
    3588                 :      116080 :       poly_int64 offset;
    3589                 :      116080 :       if (REG_P (new_base_reg))
    3590                 :             :         {
    3591                 :        1339 :           *base_term = new_base_reg;
    3592                 :        1339 :           change_p = true;
    3593                 :             :         }
    3594                 :      114741 :       else if (GET_CODE (new_base_reg) == PLUS
    3595                 :        9846 :                && REG_P (XEXP (new_base_reg, 0))
    3596                 :        9846 :                && poly_int_rtx_p (XEXP (new_base_reg, 1), &offset)
    3597                 :      124587 :                && can_add_disp_p (ad))
    3598                 :             :         {
    3599                 :        9846 :           disp += offset;
    3600                 :        9846 :           *base_term = XEXP (new_base_reg, 0);
    3601                 :        9846 :           change_p = true;
    3602                 :             :         }
    3603                 :      116080 :       if (ad->base_term2 != NULL)
    3604                 :           0 :         *ad->base_term2 = *ad->base_term;
    3605                 :             :     }
    3606                 :      116494 :   if (index_reg != new_index_reg)
    3607                 :             :     {
    3608                 :         603 :       poly_int64 offset;
    3609                 :         603 :       if (REG_P (new_index_reg))
    3610                 :             :         {
    3611                 :           0 :           *index_term = new_index_reg;
    3612                 :           0 :           change_p = true;
    3613                 :             :         }
    3614                 :         603 :       else if (GET_CODE (new_index_reg) == PLUS
    3615                 :           0 :                && REG_P (XEXP (new_index_reg, 0))
    3616                 :           0 :                && poly_int_rtx_p (XEXP (new_index_reg, 1), &offset)
    3617                 :           0 :                && can_add_disp_p (ad)
    3618                 :         603 :                && (scale = get_index_scale (ad)))
    3619                 :             :         {
    3620                 :           0 :           disp += offset * scale;
    3621                 :           0 :           *index_term = XEXP (new_index_reg, 0);
    3622                 :           0 :           change_p = true;
    3623                 :             :         }
    3624                 :             :     }
    3625                 :      116494 :   if (maybe_ne (disp, 0))
    3626                 :             :     {
    3627                 :        9846 :       if (ad->disp != NULL)
    3628                 :        1446 :         *ad->disp = plus_constant (GET_MODE (*ad->inner), *ad->disp, disp);
    3629                 :             :       else
    3630                 :             :         {
    3631                 :        8400 :           *ad->inner = plus_constant (GET_MODE (*ad->inner), *ad->inner, disp);
    3632                 :        8400 :           update_address (ad);
    3633                 :             :         }
    3634                 :             :       change_p = true;
    3635                 :             :     }
    3636                 :      116494 :   if (lra_dump_file != NULL)
    3637                 :             :     {
    3638                 :           0 :       if (! change_p)
    3639                 :           0 :         fprintf (lra_dump_file, " -- no change\n");
    3640                 :             :       else
    3641                 :             :         {
    3642                 :           0 :           fprintf (lra_dump_file, " on equiv ");
    3643                 :           0 :           dump_value_slim (lra_dump_file, *ad->outer, 1);
    3644                 :           0 :           fprintf (lra_dump_file, "\n");
    3645                 :             :         }
    3646                 :             :     }
    3647                 :             :   return change_p;
    3648                 :             : }
    3649                 :             : 
    3650                 :             : /* Skip all modifiers and whitespaces in constraint STR and return the
    3651                 :             :    result.  */
    3652                 :             : static const char *
    3653                 :   490486605 : skip_constraint_modifiers (const char *str)
    3654                 :             : {
    3655                 :   692314531 :   for (;;str++)
    3656                 :   591400568 :     switch (*str)
    3657                 :             :       {
    3658                 :   100913963 :       case '+': case '&' : case '=': case '*': case ' ': case '\t':
    3659                 :   100913963 :       case '$': case '^' : case '%': case '?': case '!':
    3660                 :   100913963 :         break;
    3661                 :   490486605 :       default: return str;
    3662                 :             :       }
    3663                 :             : }
    3664                 :             : 
    3665                 :             : /* Takes a string of 0 or more comma-separated constraints.  When more
    3666                 :             :    than one constraint is present, evaluate whether they all correspond
    3667                 :             :    to a single, repeated constraint (e.g. "r,r") or whether we have
    3668                 :             :    more than one distinct constraints (e.g. "r,m").  */
    3669                 :             : static bool
    3670                 :   156124476 : constraint_unique (const char *cstr)
    3671                 :             : {
    3672                 :   156124476 :   enum constraint_num ca, cb;
    3673                 :   156124476 :   ca = CONSTRAINT__UNKNOWN;
    3674                 :   307966946 :   for (;;)
    3675                 :             :     {
    3676                 :   307966946 :       cstr = skip_constraint_modifiers (cstr);
    3677                 :   307966946 :       if (*cstr == '\0' || *cstr == ',')
    3678                 :             :         cb = CONSTRAINT_X;
    3679                 :             :       else
    3680                 :             :         {
    3681                 :   307966946 :           cb = lookup_constraint (cstr);
    3682                 :   307966946 :           if (cb == CONSTRAINT__UNKNOWN)
    3683                 :             :             return false;
    3684                 :   296172908 :           cstr += CONSTRAINT_LEN (cstr[0], cstr);
    3685                 :             :         }
    3686                 :             :       /* Handle the first iteration of the loop.  */
    3687                 :   296172908 :       if (ca == CONSTRAINT__UNKNOWN)
    3688                 :             :         ca = cb;
    3689                 :             :       /* Handle the general case of comparing ca with subsequent
    3690                 :             :          constraints.  */
    3691                 :   151707215 :       else if (ca != cb)
    3692                 :             :         return false;
    3693                 :   159172136 :       if (*cstr == '\0')
    3694                 :             :         return true;
    3695                 :   151842470 :       if (*cstr == ',')
    3696                 :    83350258 :         cstr += 1;
    3697                 :             :     }
    3698                 :             : }
    3699                 :             : 
    3700                 :             : /* Major function to make reloads for an address in operand NOP or
    3701                 :             :    check its correctness (If CHECK_ONLY_P is true). The supported
    3702                 :             :    cases are:
    3703                 :             : 
    3704                 :             :    1) an address that existed before LRA started, at which point it
    3705                 :             :    must have been valid.  These addresses are subject to elimination
    3706                 :             :    and may have become invalid due to the elimination offset being out
    3707                 :             :    of range.
    3708                 :             : 
    3709                 :             :    2) an address created by forcing a constant to memory
    3710                 :             :    (force_const_to_mem).  The initial form of these addresses might
    3711                 :             :    not be valid, and it is this function's job to make them valid.
    3712                 :             : 
    3713                 :             :    3) a frame address formed from a register and a (possibly zero)
    3714                 :             :    constant offset.  As above, these addresses might not be valid and
    3715                 :             :    this function must make them so.
    3716                 :             : 
    3717                 :             :    Add reloads to the lists *BEFORE and *AFTER.  We might need to add
    3718                 :             :    reloads to *AFTER because of inc/dec, {pre, post} modify in the
    3719                 :             :    address.  Return true for any RTL change.
    3720                 :             : 
    3721                 :             :    The function is a helper function which does not produce all
    3722                 :             :    transformations (when CHECK_ONLY_P is false) which can be
    3723                 :             :    necessary.  It does just basic steps.  To do all necessary
    3724                 :             :    transformations use function process_address.  */
    3725                 :             : static bool
    3726                 :   169225511 : process_address_1 (int nop, bool check_only_p,
    3727                 :             :                    rtx_insn **before, rtx_insn **after)
    3728                 :             : {
    3729                 :   169225511 :   struct address_info ad;
    3730                 :   169225511 :   rtx new_reg;
    3731                 :   169225511 :   HOST_WIDE_INT scale;
    3732                 :   169225511 :   rtx op = *curr_id->operand_loc[nop];
    3733                 :   169225511 :   rtx mem = extract_mem_from_operand (op);
    3734                 :   169225511 :   const char *constraint;
    3735                 :   169225511 :   enum constraint_num cn;
    3736                 :   169225511 :   bool change_p = false;
    3737                 :             : 
    3738                 :   169225511 :   if (MEM_P (mem)
    3739                 :    35861636 :       && GET_MODE (mem) == BLKmode
    3740                 :       24507 :       && GET_CODE (XEXP (mem, 0)) == SCRATCH)
    3741                 :             :     return false;
    3742                 :             : 
    3743                 :   169225511 :   constraint
    3744                 :   169225511 :     = skip_constraint_modifiers (curr_static_id->operand[nop].constraint);
    3745                 :   169225511 :   if (IN_RANGE (constraint[0], '0', '9'))
    3746                 :             :     {
    3747                 :    13294148 :       char *end;
    3748                 :    13294148 :       unsigned long dup = strtoul (constraint, &end, 10);
    3749                 :    13294148 :       constraint
    3750                 :    13294148 :         = skip_constraint_modifiers (curr_static_id->operand[dup].constraint);
    3751                 :             :     }
    3752                 :   180731568 :   cn = lookup_constraint (*constraint == '\0' ? "X" : constraint);
    3753                 :             :   /* If we have several alternatives or/and several constraints in an
    3754                 :             :      alternative and we can not say at this stage what constraint will be used,
    3755                 :             :      use unknown constraint.  The exception is an address constraint.  If
    3756                 :             :      operand has one address constraint, probably all others constraints are
    3757                 :             :      address ones.  */
    3758                 :   157719454 :   if (constraint[0] != '\0' && get_constraint_type (cn) != CT_ADDRESS
    3759                 :   325349987 :       && !constraint_unique (constraint))
    3760                 :             :     cn = CONSTRAINT__UNKNOWN;
    3761                 :    20430701 :   if (insn_extra_address_constraint (cn)
    3762                 :             :       /* When we find an asm operand with an address constraint that
    3763                 :             :          doesn't satisfy address_operand to begin with, we clear
    3764                 :             :          is_address, so that we don't try to make a non-address fit.
    3765                 :             :          If the asm statement got this far, it's because other
    3766                 :             :          constraints are available, and we'll use them, disregarding
    3767                 :             :          the unsatisfiable address ones.  */
    3768                 :    20430701 :       && curr_static_id->operand[nop].is_address)
    3769                 :     1594959 :     decompose_lea_address (&ad, curr_id->operand_loc[nop]);
    3770                 :             :   /* Do not attempt to decompose arbitrary addresses generated by combine
    3771                 :             :      for asm operands with loose constraints, e.g 'X'.
    3772                 :             :      Need to extract memory from op for special memory constraint,
    3773                 :             :      i.e. bcst_mem_operand in i386 backend.  */
    3774                 :   167630552 :   else if (MEM_P (mem)
    3775                 :   167630819 :            && !(INSN_CODE (curr_insn) < 0
    3776                 :       15768 :                 && get_constraint_type (cn) == CT_FIXED_FORM
    3777                 :         267 :                 && constraint_satisfied_p (op, cn)))
    3778                 :    35861369 :     decompose_mem_address (&ad, mem);
    3779                 :   131769183 :   else if (GET_CODE (op) == SUBREG
    3780                 :     3658403 :            && MEM_P (SUBREG_REG (op)))
    3781                 :           0 :     decompose_mem_address (&ad, SUBREG_REG (op));
    3782                 :             :   else
    3783                 :             :     return false;
    3784                 :             :   /* If INDEX_REG_CLASS is assigned to base_term already and isn't to
    3785                 :             :      index_term, swap them so to avoid assigning INDEX_REG_CLASS to both
    3786                 :             :      when INDEX_REG_CLASS is a single register class.  */
    3787                 :    37456328 :   enum reg_class index_cl = index_reg_class (curr_insn);
    3788                 :    37456328 :   if (ad.base_term != NULL
    3789                 :    31473670 :       && ad.index_term != NULL
    3790                 :     1236924 :       && ira_class_hard_regs_num[index_cl] == 1
    3791                 :           0 :       && REG_P (*ad.base_term)
    3792                 :           0 :       && REG_P (*ad.index_term)
    3793                 :           0 :       && in_class_p (*ad.base_term, index_cl, NULL)
    3794                 :    37456328 :       && ! in_class_p (*ad.index_term, index_cl, NULL))
    3795                 :             :     {
    3796                 :           0 :       std::swap (ad.base, ad.index);
    3797                 :           0 :       std::swap (ad.base_term, ad.index_term);
    3798                 :             :     }
    3799                 :    37456328 :   if (! check_only_p)
    3800                 :    37449872 :     change_p = equiv_address_substitution (&ad);
    3801                 :    37456328 :   if (ad.base_term != NULL
    3802                 :    68929998 :       && (process_addr_reg
    3803                 :    62947340 :           (ad.base_term, check_only_p, before,
    3804                 :    31473670 :            (ad.autoinc_p
    3805                 :     4145450 :             && !(REG_P (*ad.base_term)
    3806                 :     2072725 :                  && find_regno_note (curr_insn, REG_DEAD,
    3807                 :             :                                      REGNO (*ad.base_term)) != NULL_RTX)
    3808                 :             :             ? after : NULL),
    3809                 :    31473670 :            base_reg_class (ad.mode, ad.as, ad.base_outer_code,
    3810                 :             :                            get_index_code (&ad), curr_insn))))
    3811                 :             :     {
    3812                 :      421507 :       change_p = true;
    3813                 :      421507 :       if (ad.base_term2 != NULL)
    3814                 :           0 :         *ad.base_term2 = *ad.base_term;
    3815                 :             :     }
    3816                 :    37456328 :   if (ad.index_term != NULL
    3817                 :    37456328 :       && process_addr_reg (ad.index_term, check_only_p,
    3818                 :             :                            before, NULL, index_cl))
    3819                 :             :     change_p = true;
    3820                 :             : 
    3821                 :             :   /* Target hooks sometimes don't treat extra-constraint addresses as
    3822                 :             :      legitimate address_operands, so handle them specially.  */
    3823                 :    37456328 :   if (insn_extra_address_constraint (cn)
    3824                 :    37456328 :       && satisfies_address_constraint_p (&ad, cn))
    3825                 :             :     return change_p;
    3826                 :             : 
    3827                 :    35861368 :   if (check_only_p)
    3828                 :             :     return change_p;
    3829                 :             : 
    3830                 :             :   /* There are three cases where the shape of *AD.INNER may now be invalid:
    3831                 :             : 
    3832                 :             :      1) the original address was valid, but either elimination or
    3833                 :             :      equiv_address_substitution was applied and that made
    3834                 :             :      the address invalid.
    3835                 :             : 
    3836                 :             :      2) the address is an invalid symbolic address created by
    3837                 :             :      force_const_to_mem.
    3838                 :             : 
    3839                 :             :      3) the address is a frame address with an invalid offset.
    3840                 :             : 
    3841                 :             :      4) the address is a frame address with an invalid base.
    3842                 :             : 
    3843                 :             :      All these cases involve a non-autoinc address, so there is no
    3844                 :             :      point revalidating other types.  */
    3845                 :    35855448 :   if (ad.autoinc_p || valid_address_p (op, &ad, cn))
    3846                 :    35855024 :     return change_p;
    3847                 :             : 
    3848                 :             :   /* Any index existed before LRA started, so we can assume that the
    3849                 :             :      presence and shape of the index is valid.  */
    3850                 :         424 :   push_to_sequence (*before);
    3851                 :         424 :   lra_assert (ad.disp == ad.disp_term);
    3852                 :         424 :   if (ad.base == NULL)
    3853                 :             :     {
    3854                 :         337 :       if (ad.index == NULL)
    3855                 :             :         {
    3856                 :         337 :           rtx_insn *insn;
    3857                 :         337 :           rtx_insn *last = get_last_insn ();
    3858                 :         337 :           int code = -1;
    3859                 :         337 :           enum reg_class cl = base_reg_class (ad.mode, ad.as,
    3860                 :             :                                               SCRATCH, SCRATCH,
    3861                 :             :                                               curr_insn);
    3862                 :         337 :           rtx addr = *ad.inner;
    3863                 :             : 
    3864                 :         337 :           new_reg = lra_create_new_reg (Pmode, NULL_RTX, cl, NULL, "addr");
    3865                 :         337 :           if (HAVE_lo_sum)
    3866                 :             :             {
    3867                 :             :               /* addr => lo_sum (new_base, addr), case (2) above.  */
    3868                 :             :               insn = emit_insn (gen_rtx_SET
    3869                 :             :                                 (new_reg,
    3870                 :             :                                  gen_rtx_HIGH (Pmode, copy_rtx (addr))));
    3871                 :             :               code = recog_memoized (insn);
    3872                 :             :               if (code >= 0)
    3873                 :             :                 {
    3874                 :             :                   *ad.inner = gen_rtx_LO_SUM (Pmode, new_reg, addr);
    3875                 :             :                   if (!valid_address_p (op, &ad, cn))
    3876                 :             :                     {
    3877                 :             :                       /* Try to put lo_sum into register.  */
    3878                 :             :                       insn = emit_insn (gen_rtx_SET
    3879                 :             :                                         (new_reg,
    3880                 :             :                                          gen_rtx_LO_SUM (Pmode, new_reg, addr)));
    3881                 :             :                       code = recog_memoized (insn);
    3882                 :             :                       if (code >= 0)
    3883                 :             :                         {
    3884                 :             :                           *ad.inner = new_reg;
    3885                 :             :                           if (!valid_address_p (op, &ad, cn))
    3886                 :             :                             {
    3887                 :             :                               *ad.inner = addr;
    3888                 :             :                               code = -1;
    3889                 :             :                             }
    3890                 :             :                         }
    3891                 :             : 
    3892                 :             :                     }
    3893                 :             :                 }
    3894                 :             :               if (code < 0)
    3895                 :             :                 delete_insns_since (last);
    3896                 :             :             }
    3897                 :             : 
    3898                 :         337 :           if (code < 0)
    3899                 :             :             {
    3900                 :             :               /* addr => new_base, case (2) above.  */
    3901                 :         337 :               lra_emit_move (new_reg, addr);
    3902                 :             : 
    3903                 :         674 :               for (insn = last == NULL_RTX ? get_insns () : NEXT_INSN (last);
    3904                 :         674 :                    insn != NULL_RTX;
    3905                 :         337 :                    insn = NEXT_INSN (insn))
    3906                 :         337 :                 if (recog_memoized (insn) < 0)
    3907                 :             :                   break;
    3908                 :         337 :               if (insn != NULL_RTX)
    3909                 :             :                 {
    3910                 :             :                   /* Do nothing if we cannot generate right insns.
    3911                 :             :                      This is analogous to reload pass behavior.  */
    3912                 :           0 :                   delete_insns_since (last);
    3913                 :           0 :                   end_sequence ();
    3914                 :           0 :                   return false;
    3915                 :             :                 }
    3916                 :         337 :               *ad.inner = new_reg;
    3917                 :             :             }
    3918                 :             :         }
    3919                 :             :       else
    3920                 :             :         {
    3921                 :             :           /* index * scale + disp => new base + index * scale,
    3922                 :             :              case (1) above.  */
    3923                 :           0 :           enum reg_class cl = base_reg_class (ad.mode, ad.as, PLUS,
    3924                 :           0 :                                               GET_CODE (*ad.index),
    3925                 :             :                                               curr_insn);
    3926                 :             : 
    3927                 :           0 :           lra_assert (index_cl != NO_REGS);
    3928                 :           0 :           new_reg = lra_create_new_reg (Pmode, NULL_RTX, cl, NULL, "disp");
    3929                 :           0 :           lra_emit_move (new_reg, *ad.disp);
    3930                 :           0 :           *ad.inner = simplify_gen_binary (PLUS, GET_MODE (new_reg),
    3931                 :           0 :                                            new_reg, *ad.index);
    3932                 :             :         }
    3933                 :             :     }
    3934                 :          87 :   else if (ad.index == NULL)
    3935                 :             :     {
    3936                 :          46 :       int regno;
    3937                 :          46 :       enum reg_class cl;
    3938                 :          46 :       rtx set;
    3939                 :          46 :       rtx_insn *insns, *last_insn;
    3940                 :             :       /* Try to reload base into register only if the base is invalid
    3941                 :             :          for the address but with valid offset, case (4) above.  */
    3942                 :          46 :       start_sequence ();
    3943                 :          46 :       new_reg = base_to_reg (&ad);
    3944                 :             : 
    3945                 :             :       /* base + disp => new base, cases (1) and (3) above.  */
    3946                 :             :       /* Another option would be to reload the displacement into an
    3947                 :             :          index register.  However, postreload has code to optimize
    3948                 :             :          address reloads that have the same base and different
    3949                 :             :          displacements, so reloading into an index register would
    3950                 :             :          not necessarily be a win.  */
    3951                 :          46 :       if (new_reg == NULL_RTX)
    3952                 :             :         {
    3953                 :             :           /* See if the target can split the displacement into a
    3954                 :             :              legitimate new displacement from a local anchor.  */
    3955                 :          46 :           gcc_assert (ad.disp == ad.disp_term);
    3956                 :          46 :           poly_int64 orig_offset;
    3957                 :          46 :           rtx offset1, offset2;
    3958                 :          46 :           if (poly_int_rtx_p (*ad.disp, &orig_offset)
    3959                 :          46 :               && targetm.legitimize_address_displacement (&offset1, &offset2,
    3960                 :             :                                                           orig_offset,
    3961                 :             :                                                           ad.mode))
    3962                 :             :             {
    3963                 :           0 :               new_reg = base_plus_disp_to_reg (&ad, offset1);
    3964                 :           0 :               new_reg = gen_rtx_PLUS (GET_MODE (new_reg), new_reg, offset2);
    3965                 :             :             }
    3966                 :             :           else
    3967                 :          46 :             new_reg = base_plus_disp_to_reg (&ad, *ad.disp);
    3968                 :             :         }
    3969                 :          46 :       insns = get_insns ();
    3970                 :          46 :       last_insn = get_last_insn ();
    3971                 :             :       /* If we generated at least two insns, try last insn source as
    3972                 :             :          an address.  If we succeed, we generate one less insn.  */
    3973                 :          46 :       if (REG_P (new_reg)
    3974                 :          46 :           && last_insn != insns
    3975                 :          46 :           && (set = single_set (last_insn)) != NULL_RTX
    3976                 :          46 :           && GET_CODE (SET_SRC (set)) == PLUS
    3977                 :          46 :           && REG_P (XEXP (SET_SRC (set), 0))
    3978                 :          92 :           && CONSTANT_P (XEXP (SET_SRC (set), 1)))
    3979                 :             :         {
    3980                 :           0 :           *ad.inner = SET_SRC (set);
    3981                 :           0 :           if (valid_address_p (op, &ad, cn))
    3982                 :             :             {
    3983                 :           0 :               *ad.base_term = XEXP (SET_SRC (set), 0);
    3984                 :           0 :               *ad.disp_term = XEXP (SET_SRC (set), 1);
    3985                 :           0 :               cl = base_reg_class (ad.mode, ad.as, ad.base_outer_code,
    3986                 :             :                                    get_index_code (&ad), curr_insn);
    3987                 :           0 :               regno = REGNO (*ad.base_term);
    3988                 :           0 :               if (regno >= FIRST_PSEUDO_REGISTER
    3989                 :           0 :                   && cl != lra_get_allocno_class (regno))
    3990                 :           0 :                 lra_change_class (regno, cl, "      Change to", true);
    3991                 :           0 :               new_reg = SET_SRC (set);
    3992                 :           0 :               delete_insns_since (PREV_INSN (last_insn));
    3993                 :             :             }
    3994                 :             :         }
    3995                 :          46 :       end_sequence ();
    3996                 :          46 :       emit_insn (insns);
    3997                 :          46 :       *ad.inner = new_reg;
    3998                 :             :     }
    3999                 :          41 :   else if (ad.disp_term != NULL)
    4000                 :             :     {
    4001                 :             :       /* base + scale * index + disp => new base + scale * index,
    4002                 :             :          case (1) above.  */
    4003                 :          41 :       gcc_assert (ad.disp == ad.disp_term);
    4004                 :          41 :       new_reg = base_plus_disp_to_reg (&ad, *ad.disp);
    4005                 :          41 :       *ad.inner = simplify_gen_binary (PLUS, GET_MODE (new_reg),
    4006                 :          41 :                                        new_reg, *ad.index);
    4007                 :             :     }
    4008                 :           0 :   else if ((scale = get_index_scale (&ad)) == 1)
    4009                 :             :     {
    4010                 :             :       /* The last transformation to one reg will be made in
    4011                 :             :          curr_insn_transform function.  */
    4012                 :           0 :       end_sequence ();
    4013                 :           0 :       return false;
    4014                 :             :     }
    4015                 :           0 :   else if (scale != 0)
    4016                 :             :     {
    4017                 :             :       /* base + scale * index => base + new_reg,
    4018                 :             :          case (1) above.
    4019                 :             :       Index part of address may become invalid.  For example, we
    4020                 :             :       changed pseudo on the equivalent memory and a subreg of the
    4021                 :             :       pseudo onto the memory of different mode for which the scale is
    4022                 :             :       prohibitted.  */
    4023                 :           0 :       new_reg = index_part_to_reg (&ad, index_cl);
    4024                 :           0 :       *ad.inner = simplify_gen_binary (PLUS, GET_MODE (new_reg),
    4025                 :           0 :                                        *ad.base_term, new_reg);
    4026                 :             :     }
    4027                 :             :   else
    4028                 :             :     {
    4029                 :           0 :       enum reg_class cl = base_reg_class (ad.mode, ad.as,
    4030                 :             :                                           SCRATCH, SCRATCH,
    4031                 :             :                                           curr_insn);
    4032                 :           0 :       rtx addr = *ad.inner;
    4033                 :             : 
    4034                 :           0 :       new_reg = lra_create_new_reg (Pmode, NULL_RTX, cl, NULL, "addr");
    4035                 :             :       /* addr => new_base.  */
    4036                 :           0 :       lra_emit_move (new_reg, addr);
    4037                 :           0 :       *ad.inner = new_reg;
    4038                 :             :     }
    4039                 :         424 :   *before = get_insns ();
    4040                 :         424 :   end_sequence ();
    4041                 :         424 :   return true;
    4042                 :             : }
    4043                 :             : 
    4044                 :             : /* If CHECK_ONLY_P is false, do address reloads until it is necessary.
    4045                 :             :    Use process_address_1 as a helper function.  Return true for any
    4046                 :             :    RTL changes.
    4047                 :             : 
    4048                 :             :    If CHECK_ONLY_P is true, just check address correctness.  Return
    4049                 :             :    false if the address correct.  */
    4050                 :             : static bool
    4051                 :   168771144 : process_address (int nop, bool check_only_p,
    4052                 :             :                  rtx_insn **before, rtx_insn **after)
    4053                 :             : {
    4054                 :   168771144 :   bool res = false;
    4055                 :             : 
    4056                 :   169225511 :   while (process_address_1 (nop, check_only_p, before, after))
    4057                 :             :     {
    4058                 :      454353 :       if (check_only_p)
    4059                 :             :         return true;
    4060                 :             :       res = true;
    4061                 :             :     }
    4062                 :             :   return res;
    4063                 :             : }
    4064                 :             : 
    4065                 :             : /* Override the generic address_reload_context in order to
    4066                 :             :    control the creation of reload pseudos.  */
    4067                 :             : class lra_autoinc_reload_context : public address_reload_context
    4068                 :             : {
    4069                 :             :   machine_mode mode;
    4070                 :             :   enum reg_class rclass;
    4071                 :             : 
    4072                 :             : public:
    4073                 :           0 :   lra_autoinc_reload_context (machine_mode mode, enum reg_class new_rclass)
    4074                 :           0 :     : mode (mode), rclass (new_rclass) {}
    4075                 :             : 
    4076                 :           0 :   rtx get_reload_reg () const override final
    4077                 :             :   {
    4078                 :           0 :     return lra_create_new_reg (mode, NULL_RTX, rclass, NULL, "INC/DEC result");
    4079                 :             :   }
    4080                 :             : };
    4081                 :             : 
    4082                 :             : /* Emit insns to reload VALUE into a new register.  VALUE is an
    4083                 :             :    auto-increment or auto-decrement RTX whose operand is a register or
    4084                 :             :    memory location; so reloading involves incrementing that location.
    4085                 :             : 
    4086                 :             :    INC_AMOUNT is the number to increment or decrement by (always
    4087                 :             :    positive and ignored for POST_MODIFY/PRE_MODIFY).
    4088                 :             : 
    4089                 :             :    Return a pseudo containing the result.  */
    4090                 :             : static rtx
    4091                 :           0 : emit_inc (enum reg_class new_rclass, rtx value, poly_int64 inc_amount)
    4092                 :             : {
    4093                 :           0 :   lra_autoinc_reload_context context (GET_MODE (value), new_rclass);
    4094                 :           0 :   return context.emit_autoinc (value, inc_amount);
    4095                 :             : }
    4096                 :             : 
    4097                 :             : /* Return true if the current move insn does not need processing as we
    4098                 :             :    already know that it satisfies its constraints.  */
    4099                 :             : static bool
    4100                 :    96498247 : simple_move_p (void)
    4101                 :             : {
    4102                 :    96498247 :   rtx dest, src;
    4103                 :    96498247 :   enum reg_class dclass, sclass;
    4104                 :             : 
    4105                 :    96498247 :   lra_assert (curr_insn_set != NULL_RTX);
    4106                 :    96498247 :   dest = SET_DEST (curr_insn_set);
    4107                 :    96498247 :   src = SET_SRC (curr_insn_set);
    4108                 :             : 
    4109                 :             :   /* If the instruction has multiple sets we need to process it even if it
    4110                 :             :      is single_set.  This can happen if one or more of the SETs are dead.
    4111                 :             :      See PR73650.  */
    4112                 :    96498247 :   if (multiple_sets (curr_insn))
    4113                 :             :     return false;
    4114                 :             : 
    4115                 :    96302914 :   return ((dclass = get_op_class (dest)) != NO_REGS
    4116                 :    20230881 :           && (sclass = get_op_class (src)) != NO_REGS
    4117                 :             :           /* The backend guarantees that register moves of cost 2
    4118                 :             :              never need reloads.  */
    4119                 :    86298692 :           && targetm.register_move_cost (GET_MODE (src), sclass, dclass) == 2);
    4120                 :             :  }
    4121                 :             : 
    4122                 :             : /* Swap operands NOP and NOP + 1. */
    4123                 :             : static inline void
    4124                 :    20754597 : swap_operands (int nop)
    4125                 :             : {
    4126                 :    20754597 :   std::swap (curr_operand_mode[nop], curr_operand_mode[nop + 1]);
    4127                 :    20754597 :   std::swap (original_subreg_reg_mode[nop], original_subreg_reg_mode[nop + 1]);
    4128                 :    20754597 :   std::swap (*curr_id->operand_loc[nop], *curr_id->operand_loc[nop + 1]);
    4129                 :    20754597 :   std::swap (equiv_substition_p[nop], equiv_substition_p[nop + 1]);
    4130                 :             :   /* Swap the duplicates too.  */
    4131                 :    20754597 :   lra_update_dup (curr_id, nop);
    4132                 :    20754597 :   lra_update_dup (curr_id, nop + 1);
    4133                 :    20754597 : }
    4134                 :             : 
    4135                 :             : /* Return TRUE if X is a (subreg of) reg and there are no hard regs of X class
    4136                 :             :    which can contain value of MODE.  */
    4137                 :          18 : static bool invalid_mode_reg_p (enum machine_mode mode, rtx x)
    4138                 :             : {
    4139                 :          18 :   if (SUBREG_P (x))
    4140                 :           1 :     x = SUBREG_REG (x);
    4141                 :          18 :   if (! REG_P (x))
    4142                 :             :     return false;
    4143                 :          18 :   enum reg_class rclass = get_reg_class (REGNO (x));
    4144                 :          18 :   return (!hard_reg_set_empty_p (reg_class_contents[rclass])
    4145                 :          18 :           && hard_reg_set_subset_p
    4146                 :          18 :              (reg_class_contents[rclass],
    4147                 :          18 :               ira_prohibited_class_mode_regs[rclass][mode]));
    4148                 :             : }
    4149                 :             : 
    4150                 :             : /* Return TRUE if regno is referenced in more than one non-debug insn.  */
    4151                 :             : static bool
    4152                 :     2746976 : multiple_insn_refs_p (int regno)
    4153                 :             : {
    4154                 :     2746976 :   unsigned int uid;
    4155                 :     2746976 :   bitmap_iterator bi;
    4156                 :     2746976 :   int nrefs = 0;
    4157                 :     6584369 :   EXECUTE_IF_SET_IN_BITMAP (&lra_reg_info[regno].insn_bitmap, 0, uid, bi)
    4158                 :             :     {
    4159                 :     6578767 :       if (!NONDEBUG_INSN_P (lra_insn_recog_data[uid]->insn))
    4160                 :     1090417 :         continue;
    4161                 :     5488350 :       if (nrefs == 1)
    4162                 :             :         return true;
    4163                 :     2746976 :       nrefs++;
    4164                 :             :     }
    4165                 :             :   return false;
    4166                 :             : }
    4167                 :             : 
    4168                 :             : /* Main entry point of the constraint code: search the body of the
    4169                 :             :    current insn to choose the best alternative.  It is mimicking insn
    4170                 :             :    alternative cost calculation model of former reload pass.  That is
    4171                 :             :    because machine descriptions were written to use this model.  This
    4172                 :             :    model can be changed in future.  Make commutative operand exchange
    4173                 :             :    if it is chosen.
    4174                 :             : 
    4175                 :             :    if CHECK_ONLY_P is false, do RTL changes to satisfy the
    4176                 :             :    constraints.  Return true if any change happened during function
    4177                 :             :    call.
    4178                 :             : 
    4179                 :             :    If CHECK_ONLY_P is true then don't do any transformation.  Just
    4180                 :             :    check that the insn satisfies all constraints.  If the insn does
    4181                 :             :    not satisfy any constraint, return true.  */
    4182                 :             : static bool
    4183                 :   101720699 : curr_insn_transform (bool check_only_p)
    4184                 :             : {
    4185                 :   101720699 :   int i, j, k;
    4186                 :   101720699 :   int n_operands;
    4187                 :   101720699 :   int n_alternatives;
    4188                 :   101720699 :   int n_outputs;
    4189                 :   101720699 :   int commutative;
    4190                 :   101720699 :   signed char goal_alt_matched[MAX_RECOG_OPERANDS][MAX_RECOG_OPERANDS];
    4191                 :   101720699 :   signed char match_inputs[MAX_RECOG_OPERANDS + 1];
    4192                 :   101720699 :   signed char outputs[MAX_RECOG_OPERANDS + 1];
    4193                 :   101720699 :   rtx_insn *before, *after;
    4194                 :   101720699 :   bool alt_p = false;
    4195                 :             :   /* Flag that the insn has been changed through a transformation.  */
    4196                 :   101720699 :   bool change_p;
    4197                 :   101720699 :   bool sec_mem_p;
    4198                 :   101720699 :   bool use_sec_mem_p;
    4199                 :   101720699 :   int max_regno_before;
    4200                 :   101720699 :   int reused_alternative_num;
    4201                 :             : 
    4202                 :   101720699 :   curr_insn_set = single_set (curr_insn);
    4203                 :   101720699 :   if (curr_insn_set != NULL_RTX && simple_move_p ())
    4204                 :             :     {
    4205                 :             :       /* We assume that the corresponding insn alternative has no
    4206                 :             :          earlier clobbers.  If it is not the case, don't define move
    4207                 :             :          cost equal to 2 for the corresponding register classes.  */
    4208                 :    15619303 :       lra_set_used_insn_alternative (curr_insn, LRA_NON_CLOBBERED_ALT);
    4209                 :    15619303 :       return false;
    4210                 :             :     }
    4211                 :             : 
    4212                 :    86101396 :   no_input_reloads_p = no_output_reloads_p = false;
    4213                 :    86101396 :   goal_alt_number = -1;
    4214                 :    86101396 :   change_p = sec_mem_p = false;
    4215                 :             : 
    4216                 :             :   /* CALL_INSNs are not allowed to have any output reloads.  */
    4217                 :    86101396 :   if (CALL_P (curr_insn))
    4218                 :     5792438 :     no_output_reloads_p = true;
    4219                 :             : 
    4220                 :    86101396 :   n_operands = curr_static_id->n_operands;
    4221                 :    86101396 :   n_alternatives = curr_static_id->n_alternatives;
    4222                 :             : 
    4223                 :             :   /* Just return "no reloads" if insn has no operands with
    4224                 :             :      constraints.  */
    4225                 :    86101396 :   if (n_operands == 0 || n_alternatives == 0)
    4226                 :             :     return false;
    4227                 :             : 
    4228                 :    76129868 :   max_regno_before = max_reg_num ();
    4229                 :             : 
    4230                 :   322255246 :   for (i = 0; i < n_operands; i++)
    4231                 :             :     {
    4232                 :   169995510 :       goal_alt_matched[i][0] = -1;
    4233                 :   169995510 :       goal_alt_matches[i] = -1;
    4234                 :             :     }
    4235                 :             : 
    4236                 :    76129868 :   commutative = curr_static_id->commutative;
    4237                 :             : 
    4238                 :             :   /* Now see what we need for pseudos that didn't get hard regs or got
    4239                 :             :      the wrong kind of hard reg.  For this, we must consider all the
    4240                 :             :      operands together against the register constraints.  */
    4241                 :             : 
    4242                 :    76129868 :   best_losers = best_overall = INT_MAX;
    4243                 :    76129868 :   best_reload_sum = 0;
    4244                 :             : 
    4245                 :    76129868 :   curr_swapped = false;
    4246                 :    76129868 :   goal_alt_swapped = false;
    4247                 :             : 
    4248                 :    76129868 :   if (! check_only_p)
    4249                 :             :     /* Make equivalence substitution and memory subreg elimination
    4250                 :             :        before address processing because an address legitimacy can
    4251                 :             :        depend on memory mode.  */
    4252                 :   246065222 :     for (i = 0; i < n_operands; i++)
    4253                 :             :       {
    4254                 :   169952593 :         rtx op, subst, old;
    4255                 :   169952593 :         bool op_change_p = false;
    4256                 :             : 
    4257                 :   169952593 :         if (curr_static_id->operand[i].is_operator)
    4258                 :     1376605 :           continue;
    4259                 :             : 
    4260                 :   168575988 :         old = op = *curr_id->operand_loc[i];
    4261                 :   168575988 :         if (GET_CODE (old) == SUBREG)
    4262                 :     3670210 :           old = SUBREG_REG (old);
    4263                 :   168575988 :         subst = get_equiv_with_elimination (old, curr_insn);
    4264                 :   168575988 :         original_subreg_reg_mode[i] = VOIDmode;
    4265                 :   168575988 :         equiv_substition_p[i] = false;
    4266                 :   168575988 :         if (subst != old)
    4267                 :             :           {
    4268                 :     1348329 :             equiv_substition_p[i] = true;
    4269                 :     1348329 :             subst = copy_rtx (subst);
    4270                 :     1348329 :             lra_assert (REG_P (old));
    4271                 :     1348329 :             if (GET_CODE (op) != SUBREG)
    4272                 :     1336964 :               *curr_id->operand_loc[i] = subst;
    4273                 :             :             else
    4274                 :             :               {
    4275                 :       11365 :                 SUBREG_REG (op) = subst;
    4276                 :       11365 :                 if (GET_MODE (subst) == VOIDmode)
    4277                 :          54 :                   original_subreg_reg_mode[i] = GET_MODE (old);
    4278                 :             :               }
    4279                 :     1348329 :             if (lra_dump_file != NULL)
    4280                 :             :               {
    4281                 :           5 :                 fprintf (lra_dump_file,
    4282                 :             :                          "Changing pseudo %d in operand %i of insn %u on equiv ",
    4283                 :           5 :                          REGNO (old), i, INSN_UID (curr_insn));
    4284                 :           5 :                 dump_value_slim (lra_dump_file, subst, 1);
    4285                 :           5 :                 fprintf (lra_dump_file, "\n");
    4286                 :             :               }
    4287                 :     1348329 :             op_change_p = change_p = true;
    4288                 :             :           }
    4289                 :   168575988 :         if (simplify_operand_subreg (i, GET_MODE (old)) || op_change_p)
    4290                 :             :           {
    4291                 :     1348856 :             change_p = true;
    4292                 :     1348856 :             lra_update_dup (curr_id, i);
    4293                 :             :           }
    4294                 :             :       }
    4295                 :             : 
    4296                 :             :   /* Reload address registers and displacements.  We do it before
    4297                 :             :      finding an alternative because of memory constraints.  */
    4298                 :    76129868 :   before = after = NULL;
    4299                 :   246125378 :   for (i = 0; i < n_operands; i++)
    4300                 :   169995510 :     if (! curr_static_id->operand[i].is_operator
    4301                 :   169995510 :         && process_address (i, check_only_p, &before, &after))
    4302                 :             :       {
    4303                 :      454353 :         if (check_only_p)
    4304                 :             :           return true;
    4305                 :      454353 :         change_p = true;
    4306                 :      454353 :         lra_update_dup (curr_id, i);
    4307                 :             :       }
    4308                 :             : 
    4309                 :    76129868 :   if (change_p)
    4310                 :             :     /* If we've changed the instruction then any alternative that
    4311                 :             :        we chose previously may no longer be valid.  */
    4312                 :     1758374 :     lra_set_used_insn_alternative (curr_insn, LRA_UNKNOWN_ALT);
    4313                 :             : 
    4314                 :    76112629 :   if (! check_only_p && curr_insn_set != NULL_RTX
    4315                 :   148548262 :       && check_and_process_move (&change_p, &sec_mem_p))
    4316                 :           0 :     return change_p;
    4317                 :             : 
    4318                 :    76129868 :  try_swapped:
    4319                 :             : 
    4320                 :    86222893 :   reused_alternative_num = check_only_p ? LRA_UNKNOWN_ALT : curr_id->used_insn_alternative;
    4321                 :    86222893 :   if (lra_dump_file != NULL && reused_alternative_num >= 0)
    4322                 :           0 :     fprintf (lra_dump_file, "Reusing alternative %d for insn #%u\n",
    4323                 :           0 :              reused_alternative_num, INSN_UID (curr_insn));
    4324                 :             : 
    4325                 :    86222893 :   if (process_alt_operands (reused_alternative_num))
    4326                 :    77802308 :     alt_p = true;
    4327                 :             : 
    4328                 :    86222893 :   if (check_only_p)
    4329                 :       28933 :     return ! alt_p || best_losers != 0;
    4330                 :             : 
    4331                 :             :   /* If insn is commutative (it's safe to exchange a certain pair of
    4332                 :             :      operands) then we need to try each alternative twice, the second
    4333                 :             :      time matching those two operands as if we had exchanged them.  To
    4334                 :             :      do this, really exchange them in operands.
    4335                 :             : 
    4336                 :             :      If we have just tried the alternatives the second time, return
    4337                 :             :      operands to normal and drop through.  */
    4338                 :             : 
    4339                 :    86205654 :   if (reused_alternative_num < 0 && commutative >= 0)
    4340                 :             :     {
    4341                 :    20186050 :       curr_swapped = !curr_swapped;
    4342                 :    20186050 :       if (curr_swapped)
    4343                 :             :         {
    4344                 :    10093025 :           swap_operands (commutative);
    4345                 :    10093025 :           goto try_swapped;
    4346                 :             :         }
    4347                 :             :       else
    4348                 :    10093025 :         swap_operands (commutative);
    4349                 :             :     }
    4350                 :             : 
    4351                 :    76112629 :   if (! alt_p && ! sec_mem_p)
    4352                 :             :     {
    4353                 :             :       /* No alternative works with reloads??  */
    4354                 :           6 :       if (INSN_CODE (curr_insn) >= 0)
    4355                 :           0 :         fatal_insn ("unable to generate reloads for:", curr_insn);
    4356                 :           6 :       error_for_asm (curr_insn,
    4357                 :             :                      "inconsistent operand constraints in an %<asm%>");
    4358                 :           6 :       lra_asm_error_p = true;
    4359                 :           6 :       if (! JUMP_P (curr_insn))
    4360                 :             :         {
    4361                 :             :           /* Avoid further trouble with this insn.  Don't generate use
    4362                 :             :              pattern here as we could use the insn SP offset.  */
    4363                 :           6 :           lra_set_insn_deleted (curr_insn);
    4364                 :             :         }
    4365                 :             :       else
    4366                 :             :         {
    4367                 :           0 :           lra_invalidate_insn_data (curr_insn);
    4368                 :           0 :           ira_nullify_asm_goto (curr_insn);
    4369                 :           0 :           lra_update_insn_regno_info (curr_insn);
    4370                 :             :         }
    4371                 :           6 :       return true;
    4372                 :             :     }
    4373                 :             : 
    4374                 :             :   /* If the best alternative is with operands 1 and 2 swapped, swap
    4375                 :             :      them.  Update the operand numbers of any reloads already
    4376                 :             :      pushed.  */
    4377                 :             : 
    4378                 :    76112623 :   if (goal_alt_swapped)
    4379                 :             :     {
    4380                 :      564689 :       if (lra_dump_file != NULL)
    4381                 :          18 :         fprintf (lra_dump_file, "  Commutative operand exchange in insn %u\n",
    4382                 :          18 :                  INSN_UID (curr_insn));
    4383                 :             : 
    4384                 :             :       /* Swap the duplicates too.  */
    4385                 :      564689 :       swap_operands (commutative);
    4386                 :      564689 :       change_p = true;
    4387                 :             :     }
    4388                 :             : 
    4389                 :             :   /* Some targets' TARGET_SECONDARY_MEMORY_NEEDED (e.g. x86) are defined
    4390                 :             :      too conservatively.  So we use the secondary memory only if there
    4391                 :             :      is no any alternative without reloads.  */
    4392                 :    76112623 :   use_sec_mem_p = false;
    4393                 :    76112623 :   if (! alt_p)
    4394                 :             :     use_sec_mem_p = true;
    4395                 :    76112623 :   else if (sec_mem_p)
    4396                 :             :     {
    4397                 :       14976 :       for (i = 0; i < n_operands; i++)
    4398                 :       14805 :         if (! goal_alt_win[i] && ! goal_alt_match_win[i])
    4399                 :             :           break;
    4400                 :       13312 :       use_sec_mem_p = i < n_operands;
    4401                 :             :     }
    4402                 :             : 
    4403                 :       13312 :   if (use_sec_mem_p)
    4404                 :             :     {
    4405                 :       13141 :       int in = -1, out = -1;
    4406                 :       13141 :       rtx new_reg, src, dest, rld;
    4407                 :       13141 :       machine_mode sec_mode, rld_mode;
    4408                 :             : 
    4409                 :       13141 :       lra_assert (curr_insn_set != NULL_RTX && sec_mem_p);
    4410                 :       13141 :       dest = SET_DEST (curr_insn_set);
    4411                 :       13141 :       src = SET_SRC (curr_insn_set);
    4412                 :       39423 :       for (i = 0; i < n_operands; i++)
    4413                 :       26282 :         if (*curr_id->operand_loc[i] == dest)
    4414                 :             :           out = i;
    4415                 :       13141 :         else if (*curr_id->operand_loc[i] == src)
    4416                 :       13141 :           in = i;
    4417                 :       13141 :       for (i = 0; i < curr_static_id->n_dups; i++)
    4418                 :           0 :         if (out < 0 && *curr_id->dup_loc[i] == dest)
    4419                 :           0 :           out = curr_static_id->dup_num[i];
    4420                 :           0 :         else if (in < 0 && *curr_id->dup_loc[i] == src)
    4421                 :           0 :           in = curr_static_id->dup_num[i];
    4422                 :       13141 :       lra_assert (out >= 0 && in >= 0
    4423                 :             :                   && curr_static_id->operand[out].type == OP_OUT
    4424                 :             :                   && curr_static_id->operand[in].type == OP_IN);
    4425                 :       13141 :       rld = partial_subreg_p (GET_MODE (src), GET_MODE (dest)) ? src : dest;
    4426                 :       13141 :       rld_mode = GET_MODE (rld);
    4427                 :       13141 :       sec_mode = targetm.secondary_memory_needed_mode (rld_mode);
    4428                 :       13141 :       if (rld_mode != sec_mode
    4429                 :       13141 :           && (invalid_mode_reg_p (sec_mode, dest)
    4430                 :           9 :               || invalid_mode_reg_p (sec_mode, src)))
    4431                 :             :         sec_mode = rld_mode;
    4432                 :       13141 :       new_reg = lra_create_new_reg (sec_mode, NULL_RTX, NO_REGS, NULL,
    4433                 :             :                                     "secondary");
    4434                 :             :       /* If the mode is changed, it should be wider.  */
    4435                 :       13141 :       lra_assert (!partial_subreg_p (sec_mode, rld_mode));
    4436                 :       13141 :       if (sec_mode != rld_mode)
    4437                 :             :         {
    4438                 :             :           /* If the target says specifically to use another mode for
    4439                 :             :              secondary memory moves we cannot reuse the original
    4440                 :             :              insn.  */
    4441                 :           9 :           after = emit_spill_move (false, new_reg, dest);
    4442                 :           9 :           lra_process_new_insns (curr_insn, NULL, after,
    4443                 :             :                                  "Inserting the sec. move");
    4444                 :             :           /* We may have non null BEFORE here (e.g. after address
    4445                 :             :              processing.  */
    4446                 :           9 :           push_to_sequence (before);
    4447                 :           9 :           before = emit_spill_move (true, new_reg, src);
    4448                 :           9 :           emit_insn (before);
    4449                 :           9 :           before = get_insns ();
    4450                 :           9 :           end_sequence ();
    4451                 :           9 :           lra_process_new_insns (curr_insn, before, NULL, "Changing on");
    4452                 :           9 :           lra_set_insn_deleted (curr_insn);
    4453                 :             :         }
    4454                 :       13132 :       else if (dest == rld)
    4455                 :             :         {
    4456                 :       13132 :           *curr_id->operand_loc[out] = new_reg;
    4457                 :       13132 :           lra_update_dup (curr_id, out);
    4458                 :       13132 :           after = emit_spill_move (false, new_reg, dest);
    4459                 :       13132 :           lra_process_new_insns (curr_insn, NULL, after,
    4460                 :             :                                  "Inserting the sec. move");
    4461                 :             :         }
    4462                 :             :       else
    4463                 :             :         {
    4464                 :           0 :           *curr_id->operand_loc[in] = new_reg;
    4465                 :           0 :           lra_update_dup (curr_id, in);
    4466                 :             :           /* See comments above.  */
    4467                 :           0 :           push_to_sequence (before);
    4468                 :           0 :           before = emit_spill_move (true, new_reg, src);
    4469                 :           0 :           emit_insn (before);
    4470                 :           0 :           before = get_insns ();
    4471                 :           0 :           end_sequence ();
    4472                 :           0 :           lra_process_new_insns (curr_insn, before, NULL,
    4473                 :             :                                  "Inserting the sec. move");
    4474                 :             :         }
    4475                 :       13141 :       lra_update_insn_regno_info (curr_insn);
    4476                 :       13141 :       return true;
    4477                 :             :     }
    4478                 :             : 
    4479                 :    76099482 :   lra_assert (goal_alt_number >= 0);
    4480                 :   152104250 :   lra_set_used_insn_alternative (curr_insn, goal_reuse_alt_p
    4481                 :             :                                  ? goal_alt_number : LRA_UNKNOWN_ALT);
    4482                 :             : 
    4483                 :    76099482 :   if (lra_dump_file != NULL)
    4484                 :             :     {
    4485                 :        1200 :       const char *p;
    4486                 :             : 
    4487                 :        1200 :       fprintf (lra_dump_file, "      Choosing alt %d in insn %u:",
    4488                 :        1200 :                goal_alt_number, INSN_UID (curr_insn));
    4489                 :        1200 :       print_curr_insn_alt (goal_alt_number);
    4490                 :        1200 :       if (INSN_CODE (curr_insn) >= 0
    4491                 :        1200 :           && (p = get_insn_name (INSN_CODE (curr_insn))) != NULL)
    4492                 :        1193 :         fprintf (lra_dump_file, " {%s}", p);
    4493                 :        1200 :       if (maybe_ne (curr_id->sp_offset, 0))
    4494                 :             :         {
    4495                 :           0 :           fprintf (lra_dump_file, " (sp_off=");
    4496                 :           0 :           print_dec (curr_id->sp_offset, lra_dump_file);
    4497                 :           0 :           fprintf (lra_dump_file, ")");
    4498                 :             :         }
    4499                 :        1200 :       fprintf (lra_dump_file, "\n");
    4500                 :             :     }
    4501                 :             : 
    4502                 :             :   /* Right now, for any pair of operands I and J that are required to
    4503                 :             :      match, with J < I, goal_alt_matches[I] is J.  Add I to
    4504                 :             :      goal_alt_matched[J].  */
    4505                 :             : 
    4506                 :   246025779 :   for (i = 0; i < n_operands; i++)
    4507                 :   169926297 :     if ((j = goal_alt_matches[i]) >= 0)
    4508                 :             :       {
    4509                 :    10230375 :         for (k = 0; goal_alt_matched[j][k] >= 0; k++)
    4510                 :             :           ;
    4511                 :             :         /* We allow matching one output operand and several input
    4512                 :             :            operands.  */
    4513                 :    10230374 :         lra_assert (k == 0
    4514                 :             :                     || (curr_static_id->operand[j].type == OP_OUT
    4515                 :             :                         && curr_static_id->operand[i].type == OP_IN
    4516                 :             :                         && (curr_static_id->operand
    4517                 :             :                             [goal_alt_matched[j][0]].type == OP_IN)));
    4518                 :    10230374 :         goal_alt_matched[j][k] = i;
    4519                 :    10230374 :         goal_alt_matched[j][k + 1] = -1;
    4520                 :             :       }
    4521                 :             : 
    4522                 :   246025779 :   for (i = 0; i < n_operands; i++)
    4523                 :   169926297 :     goal_alt_win[i] |= goal_alt_match_win[i];
    4524                 :             : 
    4525                 :             :   /* Any constants that aren't allowed and can't be reloaded into
    4526                 :             :      registers are here changed into memory references.  */
    4527                 :   246025779 :   for (i = 0; i < n_operands; i++)
    4528                 :   169926297 :     if (goal_alt_win[i])
    4529                 :             :       {
    4530                 :   164032131 :         int regno;
    4531                 :   164032131 :         enum reg_class new_class;
    4532                 :   164032131 :         rtx reg = *curr_id->operand_loc[i];
    4533                 :             : 
    4534                 :   164032131 :         if (GET_CODE (reg) == SUBREG)
    4535                 :     3386651 :           reg = SUBREG_REG (reg);
    4536                 :             : 
    4537                 :   164032131 :         if (REG_P (reg) && (regno = REGNO (reg)) >= FIRST_PSEUDO_REGISTER)
    4538                 :             :           {
    4539                 :    74222502 :             bool ok_p = in_class_p (reg, goal_alt[i], &new_class, true);
    4540                 :             : 
    4541                 :    74222502 :             if (new_class != NO_REGS && get_reg_class (regno) != new_class)
    4542                 :             :               {
    4543                 :     3353188 :                 lra_assert (ok_p);
    4544                 :     3353188 :                 lra_change_class (regno, new_class, "      Change to", true);
    4545                 :             :               }
    4546                 :             :           }
    4547                 :             :       }
    4548                 :             :     else
    4549                 :             :       {
    4550                 :     5894166 :         const char *constraint;
    4551                 :     5894166 :         char c;
    4552                 :     5894166 :         rtx op = *curr_id->operand_loc[i];
    4553                 :     5894166 :         rtx subreg = NULL_RTX;
    4554                 :     5894166 :         machine_mode mode = curr_operand_mode[i];
    4555                 :             : 
    4556                 :     5894166 :         if (GET_CODE (op) == SUBREG)
    4557                 :             :           {
    4558                 :      261144 :             subreg = op;
    4559                 :      261144 :             op = SUBREG_REG (op);
    4560                 :      261144 :             mode = GET_MODE (op);
    4561                 :             :           }
    4562                 :             : 
    4563                 :     6118435 :         if (CONST_POOL_OK_P (mode, op)
    4564                 :     6118435 :             && ((targetm.preferred_reload_class
    4565                 :      224269 :                  (op, (enum reg_class) goal_alt[i]) == NO_REGS)
    4566                 :       71529 :                 || no_input_reloads_p))
    4567                 :             :           {
    4568                 :      152740 :             rtx tem = force_const_mem (mode, op);
    4569                 :             : 
    4570                 :      152740 :             change_p = true;
    4571                 :      152740 :             if (subreg != NULL_RTX)
    4572                 :           0 :               tem = gen_rtx_SUBREG (mode, tem, SUBREG_BYTE (subreg));
    4573                 :             : 
    4574                 :      152740 :             *curr_id->operand_loc[i] = tem;
    4575                 :      152740 :             lra_update_dup (curr_id, i);
    4576                 :      152740 :             process_address (i, false, &before, &after);
    4577                 :             : 
    4578                 :             :             /* If the alternative accepts constant pool refs directly
    4579                 :             :                there will be no reload needed at all.  */
    4580                 :      152740 :             if (subreg != NULL_RTX)
    4581                 :           0 :               continue;
    4582                 :             :             /* Skip alternatives before the one requested.  */
    4583                 :      152740 :             constraint = (curr_static_id->operand_alternative
    4584                 :      152740 :                           [goal_alt_number * n_operands + i].constraint);
    4585                 :      152740 :             for (;
    4586                 :      255324 :                  (c = *constraint) && c != ',' && c != '#';
    4587                 :      102584 :                  constraint += CONSTRAINT_LEN (c, constraint))
    4588                 :             :               {
    4589                 :      208312 :                 enum constraint_num cn = lookup_constraint (constraint);
    4590                 :      208312 :                 if ((insn_extra_memory_constraint (cn)
    4591                 :      102661 :                      || insn_extra_special_memory_constraint (cn)
    4592                 :             :                      || insn_extra_relaxed_memory_constraint (cn))
    4593                 :      208389 :                     && satisfies_memory_constraint_p (tem, cn))
    4594                 :             :                   break;
    4595                 :             :               }
    4596                 :      152740 :             if (c == '\0' || c == ',' || c == '#')
    4597                 :       47012 :               continue;
    4598                 :             : 
    4599                 :      105728 :             goal_alt_win[i] = true;
    4600                 :             :           }
    4601                 :             :       }
    4602                 :             : 
    4603                 :             :   n_outputs = 0;
    4604                 :   246025779 :   for (i = 0; i < n_operands; i++)
    4605                 :   169926297 :     if (curr_static_id->operand[i].type == OP_OUT)
    4606                 :    66154626 :       outputs[n_outputs++] = i;
    4607                 :    76099482 :   outputs[n_outputs] = -1;
    4608                 :   246025779 :   for (i = 0; i < n_operands; i++)
    4609                 :             :     {
    4610                 :   169926297 :       int regno;
    4611                 :   169926297 :       bool optional_p = false;
    4612                 :   169926297 :       rtx old, new_reg;
    4613                 :   169926297 :       rtx op = *curr_id->operand_loc[i];
    4614                 :             : 
    4615                 :   169926297 :       if (goal_alt_win[i])
    4616                 :             :         {
    4617                 :   164137859 :           if (goal_alt[i] == NO_REGS
    4618                 :    44999308 :               && REG_P (op)
    4619                 :     5130820 :               && (regno = REGNO (op)) >= FIRST_PSEUDO_REGISTER
    4620                 :             :               /* We assigned a hard register to the pseudo in the past but now
    4621                 :             :                  decided to spill it for the insn.  If the pseudo is used only
    4622                 :             :                  in this insn, it is better to spill it here as we free hard
    4623                 :             :                  registers for other pseudos referenced in the insn.  The most
    4624                 :             :                  common case of this is a scratch register which will be
    4625                 :             :                  transformed to scratch back at the end of LRA.  */
    4626                 :   166884835 :               && !multiple_insn_refs_p (regno))
    4627                 :             :             {
    4628                 :       11204 :               if (lra_get_allocno_class (regno) != NO_REGS)
    4629                 :        5326 :                 lra_change_class (regno, NO_REGS, "      Change to", true);
    4630                 :        5602 :               reg_renumber[regno] = -1;
    4631                 :             :             }
    4632                 :             :           /* We can do an optional reload.  If the pseudo got a hard
    4633                 :             :              reg, we might improve the code through inheritance.  If
    4634                 :             :              it does not get a hard register we coalesce memory/memory
    4635                 :             :              moves later.  Ignore move insns to avoid cycling.  */
    4636                 :   164137859 :           if (! lra_simple_p
    4637                 :   163593181 :               && lra_undo_inheritance_iter < LRA_MAX_INHERITANCE_PASSES
    4638                 :   151626258 :               && goal_alt[i] != NO_REGS && REG_P (op)
    4639                 :    75276373 :               && (regno = REGNO (op)) >= FIRST_PSEUDO_REGISTER
    4640                 :    62697403 :               && regno < new_regno_start
    4641                 :    58166138 :               && ! ira_former_scratch_p (regno)
    4642                 :    58110792 :               && reg_renumber[regno] < 0
    4643                 :             :               /* Check that the optional reload pseudo will be able to
    4644                 :             :                  hold given mode value.  */
    4645                 :     3648909 :               && ! (prohibited_class_reg_set_mode_p
    4646                 :     3648909 :                     (goal_alt[i], reg_class_contents[goal_alt[i]],
    4647                 :     3648909 :                      PSEUDO_REGNO_MODE (regno)))
    4648                 :   167786758 :               && (curr_insn_set == NULL_RTX
    4649                 :     3641823 :                   || !((REG_P (SET_SRC (curr_insn_set))
    4650                 :             :                         || MEM_P (SET_SRC (curr_insn_set))
    4651                 :             :                         || GET_CODE (SET_SRC (curr_insn_set)) == SUBREG)
    4652                 :     3006601 :                        && (REG_P (SET_DEST (curr_insn_set))
    4653                 :             :                            || MEM_P (SET_DEST (curr_insn_set))
    4654                 :             :                            || GET_CODE (SET_DEST (curr_insn_set)) == SUBREG))))
    4655                 :             :             optional_p = true;
    4656                 :   163495524 :           else if (goal_alt_matched[i][0] != -1
    4657                 :     8569197 :                    && curr_static_id->operand[i].type == OP_OUT
    4658                 :     8568108 :                    && (curr_static_id->operand_alternative
    4659                 :     8568108 :                        [goal_alt_number * n_operands + i].earlyclobber)
    4660                 :       19094 :                    && REG_P (op))
    4661                 :             :             {
    4662                 :       24337 :               for (j = 0; goal_alt_matched[i][j] != -1; j++)
    4663                 :             :                 {
    4664                 :       19041 :                   rtx op2 = *curr_id->operand_loc[goal_alt_matched[i][j]];
    4665                 :             : 
    4666                 :       19041 :                   if (REG_P (op2) && REGNO (op) != REGNO (op2))
    4667                 :             :                     break;
    4668                 :             :                 }
    4669                 :       19041 :               if (goal_alt_matched[i][j] != -1)
    4670                 :             :                 {
    4671                 :             :                   /* Generate reloads for different output and matched
    4672                 :             :                      input registers.  This is the easiest way to avoid
    4673                 :             :                      creation of non-existing register conflicts in
    4674                 :             :                      lra-lives.cc.  */
    4675                 :       13745 :                   match_reload (i, goal_alt_matched[i], outputs, goal_alt[i],
    4676                 :             :                                 &goal_alt_exclude_start_hard_regs[i], &before,
    4677                 :             :                                 &after, true);
    4678                 :             :                 }
    4679                 :   165063895 :               continue;
    4680                 :       19041 :             }
    4681                 :             :           else
    4682                 :             :             {
    4683                 :   163476483 :               enum reg_class rclass, common_class;
    4684                 :             : 
    4685                 :    85564117 :               if (REG_P (op) && goal_alt[i] != NO_REGS
    4686                 :    80433297 :                   && (regno = REGNO (op)) >= new_regno_start
    4687                 :     4538388 :                   && (rclass = get_reg_class (regno)) == ALL_REGS
    4688                 :           0 :                   && ((common_class = ira_reg_class_subset[rclass][goal_alt[i]])
    4689                 :             :                       != NO_REGS)
    4690                 :           0 :                   && common_class != ALL_REGS
    4691                 :   163476483 :                   && enough_allocatable_hard_regs_p (common_class,
    4692                 :           0 :                                                      GET_MODE (op)))
    4693                 :             :                 /* Refine reload pseudo class from chosen alternative
    4694                 :             :                    constraint.  */
    4695                 :           0 :                 lra_change_class (regno, common_class, "      Change to", true);
    4696                 :   163476483 :               continue;
    4697                 :   163476483 :             }
    4698                 :             :         }
    4699                 :             : 
    4700                 :             :       /* Operands that match previous ones have already been handled.  */
    4701                 :     6430773 :       if (goal_alt_matches[i] >= 0)
    4702                 :     1568371 :         continue;
    4703                 :             : 
    4704                 :             :       /* We should not have an operand with a non-offsettable address
    4705                 :             :          appearing where an offsettable address will do.  It also may
    4706                 :             :          be a case when the address should be special in other words
    4707                 :             :          not a general one (e.g. it needs no index reg).  */
    4708                 :     4862402 :       if (goal_alt_matched[i][0] == -1 && goal_alt_offmemok[i] && MEM_P (op))
    4709                 :             :         {
    4710                 :          72 :           enum reg_class rclass;
    4711                 :          72 :           rtx *loc = &XEXP (op, 0);
    4712                 :          72 :           enum rtx_code code = GET_CODE (*loc);
    4713                 :             : 
    4714                 :          72 :           push_to_sequence (before);
    4715                 :          72 :           rclass = base_reg_class (GET_MODE (op), MEM_ADDR_SPACE (op),
    4716                 :             :                                    MEM, SCRATCH, curr_insn);
    4717                 :          72 :           if (GET_RTX_CLASS (code) == RTX_AUTOINC)
    4718                 :           0 :             new_reg = emit_inc (rclass, *loc,
    4719                 :             :                                 /* This value does not matter for MODIFY.  */
    4720                 :           0 :                                 GET_MODE_SIZE (GET_MODE (op)));
    4721                 :          72 :           else if (get_reload_reg (OP_IN, Pmode, *loc, rclass,
    4722                 :             :                                    NULL, false, false,
    4723                 :             :                                    "offsetable address", &new_reg))
    4724                 :             :             {
    4725                 :          72 :               rtx addr = *loc;
    4726                 :          72 :               enum rtx_code code = GET_CODE (addr);
    4727                 :          72 :               bool align_p = false;
    4728                 :             : 
    4729                 :          72 :               if (code == AND && CONST_INT_P (XEXP (addr, 1)))
    4730                 :             :                 {
    4731                 :             :                   /* (and ... (const_int -X)) is used to align to X bytes.  */
    4732                 :           0 :                   align_p = true;
    4733                 :           0 :                   addr = XEXP (*loc, 0);
    4734                 :             :                 }
    4735                 :             :               else
    4736                 :          72 :                 addr = canonicalize_reload_addr (addr);
    4737                 :             : 
    4738                 :          72 :               lra_emit_move (new_reg, addr);
    4739                 :          72 :               if (align_p)
    4740                 :           0 :                 emit_move_insn (new_reg, gen_rtx_AND (GET_MODE (new_reg), new_reg, XEXP (*loc, 1)));
    4741                 :             :             }
    4742                 :          72 :           before = get_insns ();
    4743                 :          72 :           end_sequence ();
    4744                 :          72 :           *loc = new_reg;
    4745                 :          72 :           lra_update_dup (curr_id, i);
    4746                 :          72 :         }
    4747                 :     4862330 :       else if (goal_alt_matched[i][0] == -1)
    4748                 :             :         {
    4749                 :     3201154 :           machine_mode mode;
    4750                 :     3201154 :           rtx reg, *loc;
    4751                 :     3201154 :           int hard_regno;
    4752                 :     3201154 :           enum op_type type = curr_static_id->operand[i].type;
    4753                 :             : 
    4754                 :     3201154 :           loc = curr_id->operand_loc[i];
    4755                 :     3201154 :           mode = curr_operand_mode[i];
    4756                 :     3201154 :           if (GET_CODE (*loc) == SUBREG)
    4757                 :             :             {
    4758                 :       95266 :               reg = SUBREG_REG (*loc);
    4759                 :       95266 :               poly_int64 byte = SUBREG_BYTE (*loc);
    4760                 :       95266 :               if (REG_P (reg)
    4761                 :             :                   /* Strict_low_part requires reloading the register and not
    4762                 :             :                      just the subreg.  Likewise for a strict subreg no wider
    4763                 :             :                      than a word for WORD_REGISTER_OPERATIONS targets.  */
    4764                 :       95266 :                   && (curr_static_id->operand[i].strict_low
    4765                 :       95182 :                       || (!paradoxical_subreg_p (mode, GET_MODE (reg))
    4766                 :       92792 :                           && (hard_regno
    4767                 :       92792 :                               = get_try_hard_regno (REGNO (reg))) >= 0
    4768                 :       89815 :                           && (simplify_subreg_regno
    4769                 :      185081 :                               (hard_regno,
    4770                 :       89815 :                                GET_MODE (reg), byte, mode) < 0)
    4771                 :           0 :                           && (goal_alt[i] == NO_REGS
    4772                 :           0 :                               || (simplify_subreg_regno
    4773                 :       95266 :                                   (ira_class_hard_regs[goal_alt[i]][0],
    4774                 :           0 :                                    GET_MODE (reg), byte, mode) >= 0)))
    4775                 :       95182 :                       || (partial_subreg_p (mode, GET_MODE (reg))
    4776                 :       95182 :                           && known_le (GET_MODE_SIZE (GET_MODE (reg)),
    4777                 :             :                                        UNITS_PER_WORD)
    4778                 :             :                           && WORD_REGISTER_OPERATIONS))
    4779                 :             :                   /* Avoid the situation when there are no available hard regs
    4780                 :             :                      for the pseudo mode but there are ones for the subreg
    4781                 :             :                      mode: */
    4782                 :       95350 :                   && !(goal_alt[i] != NO_REGS
    4783                 :          84 :                        && REGNO (reg) >= FIRST_PSEUDO_REGISTER
    4784                 :          84 :                        && (prohibited_class_reg_set_mode_p
    4785                 :          84 :                            (goal_alt[i], reg_class_contents[goal_alt[i]],
    4786                 :          84 :                             GET_MODE (reg)))
    4787                 :             :                        && !(prohibited_class_reg_set_mode_p
    4788                 :           0 :                             (goal_alt[i], reg_class_contents[goal_alt[i]],
    4789                 :             :                              mode))))
    4790                 :             :                 {
    4791                 :             :                   /* An OP_INOUT is required when reloading a subreg of a
    4792                 :             :                      mode wider than a word to ensure that data beyond the
    4793                 :             :                      word being reloaded is preserved.  Also automatically
    4794                 :             :                      ensure that strict_low_part reloads are made into
    4795                 :             :                      OP_INOUT which should already be true from the backend
    4796                 :             :                      constraints.  */
    4797                 :          84 :                   if (type == OP_OUT
    4798                 :          84 :                       && (curr_static_id->operand[i].strict_low
    4799                 :           0 :                           || read_modify_subreg_p (*loc)))
    4800                 :             :                     type = OP_INOUT;
    4801                 :          84 :                   loc = &SUBREG_REG (*loc);
    4802                 :          84 :                   mode = GET_MODE (*loc);
    4803                 :             :                 }
    4804                 :             :             }
    4805                 :     3201154 :           old = *loc;
    4806                 :     3201154 :           if (get_reload_reg (type, mode, old, goal_alt[i],
    4807                 :             :                               &goal_alt_exclude_start_hard_regs[i],
    4808                 :     3201154 :                               loc != curr_id->operand_loc[i],
    4809                 :     3201154 :                               curr_static_id->operand_alternative
    4810                 :     3201154 :                               [goal_alt_number * n_operands + i].earlyclobber,
    4811                 :             :                                "", &new_reg)
    4812                 :     3201154 :               && type != OP_OUT)
    4813                 :             :             {
    4814                 :     2232739 :               push_to_sequence (before);
    4815                 :     2232739 :               lra_emit_move (new_reg, old);
    4816                 :     2232739 :               before = get_insns ();
    4817                 :     2232739 :               end_sequence ();
    4818                 :             :             }
    4819                 :     3201154 :           *loc = new_reg;
    4820                 :     3201154 :           if (type != OP_IN
    4821                 :      967349 :               && find_reg_note (curr_insn, REG_UNUSED, old) == NULL_RTX
    4822                 :             :               /* OLD can be an equivalent constant here.  */
    4823                 :     4145361 :               && !CONSTANT_P (old))
    4824                 :             :             {
    4825                 :      944207 :               start_sequence ();
    4826                 :      944207 :               lra_emit_move (type == OP_INOUT ? copy_rtx (old) : old, new_reg);
    4827                 :      944207 :               emit_insn (after);
    4828                 :      944207 :               after = get_insns ();
    4829                 :      944207 :               end_sequence ();
    4830                 :      944207 :               *loc = new_reg;
    4831                 :             :             }
    4832                 :     3201154 :           for (j = 0; j < goal_alt_dont_inherit_ops_num; j++)
    4833                 :         584 :             if (goal_alt_dont_inherit_ops[j] == i)
    4834                 :             :               {
    4835                 :         584 :                 lra_set_regno_unique_value (REGNO (new_reg));
    4836                 :         584 :                 break;
    4837                 :             :               }
    4838                 :     3201154 :           lra_update_dup (curr_id, i);
    4839                 :             :         }
    4840                 :     1661176 :       else if (curr_static_id->operand[i].type == OP_IN
    4841                 :     1661176 :                && (curr_static_id->operand[goal_alt_matched[i][0]].type
    4842                 :             :                    == OP_OUT
    4843                 :           0 :                    || (curr_static_id->operand[goal_alt_matched[i][0]].type
    4844                 :             :                        == OP_INOUT
    4845                 :           0 :                        && (operands_match_p
    4846                 :           0 :                            (*curr_id->operand_loc[i],
    4847                 :           0 :                             *curr_id->operand_loc[goal_alt_matched[i][0]],
    4848                 :             :                             -1)))))
    4849                 :             :         {
    4850                 :             :           /* generate reloads for input and matched outputs.  */
    4851                 :       17832 :           match_inputs[0] = i;
    4852                 :       17832 :           match_inputs[1] = -1;
    4853                 :       17832 :           match_reload (goal_alt_matched[i][0], match_inputs, outputs,
    4854                 :             :                         goal_alt[i], &goal_alt_exclude_start_hard_regs[i],
    4855                 :             :                         &before, &after,
    4856                 :       17832 :                         curr_static_id->operand_alternative
    4857                 :       17832 :                         [goal_alt_number * n_operands + goal_alt_matched[i][0]]
    4858                 :       17832 :                         .earlyclobber);
    4859                 :             :         }
    4860                 :     1643344 :       else if ((curr_static_id->operand[i].type == OP_OUT
    4861                 :           1 :                 || (curr_static_id->operand[i].type == OP_INOUT
    4862                 :           1 :                     && (operands_match_p
    4863                 :           1 :                         (*curr_id->operand_loc[i],
    4864                 :           1 :                          *curr_id->operand_loc[goal_alt_matched[i][0]],
    4865                 :             :                          -1))))
    4866                 :     1643345 :                && (curr_static_id->operand[goal_alt_matched[i][0]].type
    4867                 :             :                     == OP_IN))
    4868                 :             :         /* Generate reloads for output and matched inputs.  */
    4869                 :     1643344 :         match_reload (i, goal_alt_matched[i], outputs, goal_alt[i],
    4870                 :             :                       &goal_alt_exclude_start_hard_regs[i], &before, &after,
    4871                 :     1643344 :                       curr_static_id->operand_alternative
    4872                 :     1643344 :                       [goal_alt_number * n_operands + i].earlyclobber);
    4873                 :           0 :       else if (curr_static_id->operand[i].type == OP_IN
    4874                 :           0 :                && (curr_static_id->operand[goal_alt_matched[i][0]].type
    4875                 :             :                    == OP_IN))
    4876                 :             :         {
    4877                 :             :           /* Generate reloads for matched inputs.  */
    4878                 :           0 :           match_inputs[0] = i;
    4879                 :           0 :           for (j = 0; (k = goal_alt_matched[i][j]) >= 0; j++)
    4880                 :           0 :             match_inputs[j + 1] = k;
    4881                 :           0 :           match_inputs[j + 1] = -1;
    4882                 :           0 :           match_reload (-1, match_inputs, outputs, goal_alt[i],
    4883                 :             :                         &goal_alt_exclude_start_hard_regs[i],
    4884                 :             :                         &before, &after, false);
    4885                 :             :         }
    4886                 :             :       else
    4887                 :             :         /* We must generate code in any case when function
    4888                 :             :            process_alt_operands decides that it is possible.  */
    4889                 :           0 :         gcc_unreachable ();
    4890                 :             : 
    4891                 :     4862402 :       if (optional_p)
    4892                 :             :         {
    4893                 :      642335 :           rtx reg = op;
    4894                 :             : 
    4895                 :      642335 :           lra_assert (REG_P (reg));
    4896                 :      642335 :           regno = REGNO (reg);
    4897                 :      642335 :           op = *curr_id->operand_loc[i]; /* Substitution.  */
    4898                 :      642335 :           if (GET_CODE (op) == SUBREG)
    4899                 :           0 :             op = SUBREG_REG (op);
    4900                 :      642335 :           gcc_assert (REG_P (op) && (int) REGNO (op) >= new_regno_start);
    4901                 :      642335 :           bitmap_set_bit (&lra_optional_reload_pseudos, REGNO (op));
    4902                 :      642335 :           lra_reg_info[REGNO (op)].restore_rtx = reg;
    4903                 :      642335 :           if (lra_dump_file != NULL)
    4904                 :           0 :             fprintf (lra_dump_file,
    4905                 :             :                      "      Making reload reg %d for reg %d optional\n",
    4906                 :             :                      REGNO (op), regno);
    4907                 :             :         }
    4908                 :             :     }
    4909                 :    71998630 :   if (before != NULL_RTX || after != NULL_RTX
    4910                 :   147283174 :       || max_regno_before != max_reg_num ())
    4911                 :     4940588 :     change_p = true;
    4912                 :    76099482 :   if (change_p)
    4913                 :             :     {
    4914                 :     5742908 :       lra_update_operator_dups (curr_id);
    4915                 :             :       /* Something changes -- process the insn.  */
    4916                 :     5742908 :       lra_update_insn_regno_info (curr_insn);
    4917                 :     5742908 :       if (asm_noperands (PATTERN (curr_insn)) >= 0
    4918                 :     5742908 :           && ++curr_id->asm_reloads_num >= FIRST_PSEUDO_REGISTER)
    4919                 :             :         /* Most probably there are no enough registers to satisfy asm insn: */
    4920                 :           1 :         lra_asm_insn_error (curr_insn);
    4921                 :             :     }
    4922                 :    76099482 :   if (goal_alt_out_sp_reload_p)
    4923                 :             :     {
    4924                 :             :       /* We have an output stack pointer reload -- update sp offset: */
    4925                 :           0 :       rtx set;
    4926                 :           0 :       bool done_p = false;
    4927                 :           0 :       poly_int64 sp_offset = curr_id->sp_offset;
    4928                 :           0 :       for (rtx_insn *insn = after; insn != NULL_RTX; insn = NEXT_INSN (insn))
    4929                 :           0 :         if ((set = single_set (insn)) != NULL_RTX
    4930                 :           0 :             && SET_DEST (set) == stack_pointer_rtx)
    4931                 :             :           {
    4932                 :           0 :             lra_assert (!done_p);
    4933                 :           0 :             done_p = true;
    4934                 :           0 :             curr_id->sp_offset = 0;
    4935                 :           0 :             lra_insn_recog_data_t id = lra_get_insn_recog_data (insn);
    4936                 :           0 :             id->sp_offset = sp_offset;
    4937                 :           0 :             if (lra_dump_file != NULL)
    4938                 :           0 :               fprintf (lra_dump_file,
    4939                 :             :                        "            Moving sp offset from insn %u to %u\n",
    4940                 :           0 :                        INSN_UID (curr_insn), INSN_UID (insn));
    4941                 :             :           }
    4942                 :           0 :       lra_assert (done_p);
    4943                 :             :     }
    4944                 :    76099482 :   lra_process_new_insns (curr_insn, before, after, "Inserting insn reload");
    4945                 :    76099482 :   return change_p;
    4946                 :             : }
    4947                 :             : 
    4948                 :             : /* Return true if INSN satisfies all constraints.  In other words, no
    4949                 :             :    reload insns are needed.  */
    4950                 :             : bool
    4951                 :        3755 : lra_constrain_insn (rtx_insn *insn)
    4952                 :             : {
    4953                 :        3755 :   int saved_new_regno_start = new_regno_start;
    4954                 :        3755 :   int saved_new_insn_uid_start = new_insn_uid_start;
    4955                 :        3755 :   bool change_p;
    4956                 :             : 
    4957                 :        3755 :   curr_insn = insn;
    4958                 :        3755 :   curr_id = lra_get_insn_recog_data (curr_insn);
    4959                 :        3755 :   curr_static_id = curr_id->insn_static_data;
    4960                 :        3755 :   new_insn_uid_start = get_max_uid ();
    4961                 :        3755 :   new_regno_start = max_reg_num ();
    4962                 :        3755 :   change_p = curr_insn_transform (true);
    4963                 :        3755 :   new_regno_start = saved_new_regno_start;
    4964                 :        3755 :   new_insn_uid_start = saved_new_insn_uid_start;
    4965                 :        3755 :   return ! change_p;
    4966                 :             : }
    4967                 :             : 
    4968                 :             : /* Return true if X is in LIST.  */
    4969                 :             : static bool
    4970                 :     1193676 : in_list_p (rtx x, rtx list)
    4971                 :             : {
    4972                 :     2024940 :   for (; list != NULL_RTX; list = XEXP (list, 1))
    4973                 :     1120879 :     if (XEXP (list, 0) == x)
    4974                 :             :       return true;
    4975                 :             :   return false;
    4976                 :             : }
    4977                 :             : 
    4978                 :             : /* Return true if X contains an allocatable hard register (if
    4979                 :             :    HARD_REG_P) or a (spilled if SPILLED_P) pseudo.  */
    4980                 :             : static bool
    4981                 :     5904012 : contains_reg_p (rtx x, bool hard_reg_p, bool spilled_p)
    4982                 :             : {
    4983                 :     5904012 :   int i, j;
    4984                 :     5904012 :   const char *fmt;
    4985                 :     5904012 :   enum rtx_code code;
    4986                 :             : 
    4987                 :     5904012 :   code = GET_CODE (x);
    4988                 :     5904012 :   if (REG_P (x))
    4989                 :             :     {
    4990                 :     1366754 :       int regno = REGNO (x);
    4991                 :     1366754 :       HARD_REG_SET alloc_regs;
    4992                 :             : 
    4993                 :     1366754 :       if (hard_reg_p)
    4994                 :             :         {
    4995                 :      429855 :           if (regno >= FIRST_PSEUDO_REGISTER)
    4996                 :      132187 :             regno = lra_get_regno_hard_regno (regno);
    4997                 :      429855 :           if (regno < 0)
    4998                 :             :             return false;
    4999                 :      429855 :           alloc_regs = ~lra_no_alloc_regs;
    5000                 :      429855 :           return overlaps_hard_reg_set_p (alloc_regs, GET_MODE (x), regno);
    5001                 :             :         }
    5002                 :             :       else
    5003                 :             :         {
    5004                 :      936899 :           if (regno < FIRST_PSEUDO_REGISTER)
    5005                 :             :             return false;
    5006                 :      312445 :           if (! spilled_p)
    5007                 :             :             return true;
    5008                 :      166072 :           return lra_get_regno_hard_regno (regno) < 0;
    5009                 :             :         }
    5010                 :             :     }
    5011                 :     4537258 :   fmt = GET_RTX_FORMAT (code);
    5012                 :    11701071 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
    5013                 :             :     {
    5014                 :     7700892 :       if (fmt[i] == 'e')
    5015                 :             :         {
    5016                 :     3748647 :           if (contains_reg_p (XEXP (x, i), hard_reg_p, spilled_p))
    5017                 :             :             return true;
    5018                 :             :         }
    5019                 :     3952245 :       else if (fmt[i] == 'E')
    5020                 :             :         {
    5021                 :      248706 :           for (j = XVECLEN (x, i) - 1; j >= 0; j--)
    5022                 :      194772 :             if (contains_reg_p (XVECEXP (x, i, j), hard_reg_p, spilled_p))
    5023                 :             :               return true;
    5024                 :             :         }
    5025                 :             :     }
    5026                 :             :   return false;
    5027                 :             : }
    5028                 :             : 
    5029                 :             : /* Process all regs in location *LOC and change them on equivalent
    5030                 :             :    substitution.  Return true if any change was done.  */
    5031                 :             : static bool
    5032                 :        3097 : loc_equivalence_change_p (rtx *loc)
    5033                 :             : {
    5034                 :        3097 :   rtx subst, reg, x = *loc;
    5035                 :        3097 :   bool result = false;
    5036                 :        3097 :   enum rtx_code code = GET_CODE (x);
    5037                 :        3097 :   const char *fmt;
    5038                 :        3097 :   int i, j;
    5039                 :             : 
    5040                 :        3097 :   if (code == SUBREG)
    5041                 :             :     {
    5042                 :          10 :       reg = SUBREG_REG (x);
    5043                 :          10 :       if ((subst = get_equiv_with_elimination (reg, curr_insn)) != reg
    5044                 :          10 :           && GET_MODE (subst) == VOIDmode)
    5045                 :             :         {
    5046                 :             :           /* We cannot reload debug location.  Simplify subreg here
    5047                 :             :              while we know the inner mode.  */
    5048                 :           0 :           *loc = simplify_gen_subreg (GET_MODE (x), subst,
    5049                 :           0 :                                       GET_MODE (reg), SUBREG_BYTE (x));
    5050                 :           0 :           return true;
    5051                 :             :         }
    5052                 :             :     }
    5053                 :        3097 :   if (code == REG && (subst = get_equiv_with_elimination (x, curr_insn)) != x)
    5054                 :             :     {
    5055                 :           5 :       *loc = subst;
    5056                 :           5 :       return true;
    5057                 :             :     }
    5058                 :             : 
    5059                 :             :   /* Scan all the operand sub-expressions.  */
    5060                 :        3092 :   fmt = GET_RTX_FORMAT (code);
    5061                 :        7496 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
    5062                 :             :     {
    5063                 :        4404 :       if (fmt[i] == 'e')
    5064                 :        2427 :         result = loc_equivalence_change_p (&XEXP (x, i)) || result;
    5065                 :        1977 :       else if (fmt[i] == 'E')
    5066                 :         135 :         for (j = XVECLEN (x, i) - 1; j >= 0; j--)
    5067                 :         100 :           result
    5068                 :         110 :             = loc_equivalence_change_p (&XVECEXP (x, i, j)) || result;
    5069                 :             :     }
    5070                 :             :   return result;
    5071                 :             : }
    5072                 :             : 
    5073                 :             : /* Similar to loc_equivalence_change_p, but for use as
    5074                 :             :    simplify_replace_fn_rtx callback.  DATA is insn for which the
    5075                 :             :    elimination is done.  If it null we don't do the elimination.  */
    5076                 :             : static rtx
    5077                 :    38906545 : loc_equivalence_callback (rtx loc, const_rtx, void *data)
    5078                 :             : {
    5079                 :    38906545 :   if (!REG_P (loc))
    5080                 :             :     return NULL_RTX;
    5081                 :             : 
    5082                 :     9991239 :   rtx subst = (data == NULL
    5083                 :     9991239 :                ? get_equiv (loc) : get_equiv_with_elimination (loc, (rtx_insn *) data));
    5084                 :     9991239 :   if (subst != loc)
    5085                 :             :     return subst;
    5086                 :             : 
    5087                 :             :   return NULL_RTX;
    5088                 :             : }
    5089                 :             : 
    5090                 :             : /* Maximum number of generated reload insns per an insn.  It is for
    5091                 :             :    preventing this pass cycling in a bug case.  */
    5092                 :             : #define MAX_RELOAD_INSNS_NUMBER LRA_MAX_INSN_RELOADS
    5093                 :             : 
    5094                 :             : /* The current iteration number of this LRA pass.  */
    5095                 :             : int lra_constraint_iter;
    5096                 :             : 
    5097                 :             : /* True if we should during assignment sub-pass check assignment
    5098                 :             :    correctness for all pseudos and spill some of them to correct
    5099                 :             :    conflicts.  It can be necessary when we substitute equiv which
    5100                 :             :    needs checking register allocation correctness because the
    5101                 :             :    equivalent value contains allocatable hard registers, or when we
    5102                 :             :    restore multi-register pseudo, or when we change the insn code and
    5103                 :             :    its operand became INOUT operand when it was IN one before.  */
    5104                 :             : bool check_and_force_assignment_correctness_p;
    5105                 :             : 
    5106                 :             : /* Return true if REGNO is referenced in more than one block.  */
    5107                 :             : static bool
    5108                 :      141160 : multi_block_pseudo_p (int regno)
    5109                 :             : {
    5110                 :      141160 :   basic_block bb = NULL;
    5111                 :      141160 :   unsigned int uid;
    5112                 :      141160 :   bitmap_iterator bi;
    5113                 :             : 
    5114                 :      141160 :   if (regno < FIRST_PSEUDO_REGISTER)
    5115                 :             :     return false;
    5116                 :             : 
    5117                 :      432188 :   EXECUTE_IF_SET_IN_BITMAP (&lra_reg_info[regno].insn_bitmap, 0, uid, bi)
    5118                 :      295759 :     if (bb == NULL)
    5119                 :      141160 :       bb = BLOCK_FOR_INSN (lra_insn_recog_data[uid]->insn);
    5120                 :      154599 :     else if (BLOCK_FOR_INSN (lra_insn_recog_data[uid]->insn) != bb)
    5121                 :             :       return true;
    5122                 :             :   return false;
    5123                 :             : }
    5124                 :             : 
    5125                 :             : /* Return true if LIST contains a deleted insn.  */
    5126                 :             : static bool
    5127                 :      655321 : contains_deleted_insn_p (rtx_insn_list *list)
    5128                 :             : {
    5129                 :     1253206 :   for (; list != NULL_RTX; list = list->next ())
    5130                 :      597885 :     if (NOTE_P (list->insn ())
    5131                 :      597885 :         && NOTE_KIND (list->insn ()) == NOTE_INSN_DELETED)
    5132                 :             :       return true;
    5133                 :             :   return false;
    5134                 :             : }
    5135                 :             : 
    5136                 :             : /* Return true if X contains a pseudo dying in INSN.  */
    5137                 :             : static bool
    5138                 :     1855571 : dead_pseudo_p (rtx x, rtx_insn *insn)
    5139                 :             : {
    5140                 :     1855571 :   int i, j;
    5141                 :     1855571 :   const char *fmt;
    5142                 :     1855571 :   enum rtx_code code;
    5143                 :             : 
    5144                 :     1855571 :   if (REG_P (x))
    5145                 :      456397 :     return (insn != NULL_RTX
    5146                 :      456397 :             && find_regno_note (insn, REG_DEAD, REGNO (x)) != NULL_RTX);
    5147                 :     1399174 :   code = GET_CODE (x);
    5148                 :     1399174 :   fmt = GET_RTX_FORMAT (code);
    5149                 :     3706578 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
    5150                 :             :     {
    5151                 :     2313854 :       if (fmt[i] == 'e')
    5152                 :             :         {
    5153                 :     1230813 :           if (dead_pseudo_p (XEXP (x, i), insn))
    5154                 :             :             return true;
    5155                 :             :         }
    5156                 :     1083041 :       else if (fmt[i] == 'E')
    5157                 :             :         {
    5158                 :       38944 :           for (j = XVECLEN (x, i) - 1; j >= 0; j--)
    5159                 :       28192 :             if (dead_pseudo_p (XVECEXP (x, i, j), insn))
    5160                 :             :               return true;
    5161                 :             :         }
    5162                 :             :     }
    5163                 :             :   return false;
    5164                 :             : }
    5165                 :             : 
    5166                 :             : /* Return true if INSN contains a dying pseudo in INSN right hand
    5167                 :             :    side.  */
    5168                 :             : static bool
    5169                 :      596566 : insn_rhs_dead_pseudo_p (rtx_insn *insn)
    5170                 :             : {
    5171                 :      596566 :   rtx set = single_set (insn);
    5172                 :             : 
    5173                 :      596566 :   gcc_assert (set != NULL);
    5174                 :      596566 :   return dead_pseudo_p (SET_SRC (set), insn);
    5175                 :             : }
    5176                 :             : 
    5177                 :             : /* Return true if any init insn of REGNO contains a dying pseudo in
    5178                 :             :    insn right hand side.  */
    5179                 :             : static bool
    5180                 :      654003 : init_insn_rhs_dead_pseudo_p (int regno)
    5181                 :             : {
    5182                 :      654003 :   rtx_insn_list *insns = ira_reg_equiv[regno].init_insns;
    5183                 :             : 
    5184                 :      654003 :   if (insns == NULL)
    5185                 :             :     return false;
    5186                 :     1186991 :   for (; insns != NULL_RTX; insns = insns->next ())
    5187                 :      596566 :     if (insn_rhs_dead_pseudo_p (insns->insn ()))
    5188                 :             :       return true;
    5189                 :             :   return false;
    5190                 :             : }
    5191                 :             : 
    5192                 :             : /* Return TRUE if REGNO has a reverse equivalence.  The equivalence is
    5193                 :             :    reverse only if we have one init insn with given REGNO as a
    5194                 :             :    source.  */
    5195                 :             : static bool
    5196                 :      655321 : reverse_equiv_p (int regno)
    5197                 :             : {
    5198                 :      655321 :   rtx_insn_list *insns = ira_reg_equiv[regno].init_insns;
    5199                 :      655321 :   rtx set;
    5200                 :             : 
    5201                 :      655321 :   if (insns == NULL)
    5202                 :             :     return false;
    5203                 :      597884 :   if (! INSN_P (insns->insn ())
    5204                 :     1195768 :       || insns->next () != NULL)
    5205                 :             :     return false;
    5206                 :      597883 :   if ((set = single_set (insns->insn ())) == NULL_RTX)
    5207                 :             :     return false;
    5208                 :      597883 :   return REG_P (SET_SRC (set)) && (int) REGNO (SET_SRC (set)) == regno;
    5209                 :             : }
    5210                 :             : 
    5211                 :             : /* Return TRUE if REGNO was reloaded in an equivalence init insn.  We
    5212                 :             :    call this function only for non-reverse equivalence.  */
    5213                 :             : static bool
    5214                 :      647862 : contains_reloaded_insn_p (int regno)
    5215                 :             : {
    5216                 :      647862 :   rtx set;
    5217                 :      647862 :   rtx_insn_list *list = ira_reg_equiv[regno].init_insns;
    5218                 :             : 
    5219                 :     1238287 :   for (; list != NULL; list = list->next ())
    5220                 :      590425 :     if ((set = single_set (list->insn ())) == NULL_RTX
    5221                 :      590425 :         || ! REG_P (SET_DEST (set))
    5222                 :     1180850 :         || (int) REGNO (SET_DEST (set)) != regno)
    5223                 :             :       return true;
    5224                 :             :   return false;
    5225                 :             : }
    5226                 :             : 
    5227                 :             : /* Try combine secondary memory reload insn FROM for insn TO into TO insn.
    5228                 :             :    FROM should be a load insn (usually a secondary memory reload insn).  Return
    5229                 :             :    TRUE in case of success.  */
    5230                 :             : static bool
    5231                 :     7017643 : combine_reload_insn (rtx_insn *from, rtx_insn *to)
    5232                 :             : {
    5233                 :     7017643 :   bool ok_p;
    5234                 :     7017643 :   rtx_insn *saved_insn;
    5235                 :     7017643 :   rtx set, from_reg, to_reg, op;
    5236                 :     7017643 :   enum reg_class to_class, from_class;
    5237                 :     7017643 :   int n, nop;
    5238                 :     7017643 :   signed char changed_nops[MAX_RECOG_OPERANDS + 1];
    5239                 :             : 
    5240                 :             :   /* Check conditions for second memory reload and original insn:  */
    5241                 :     7017643 :   if ((targetm.secondary_memory_needed
    5242                 :             :        == hook_bool_mode_reg_class_t_reg_class_t_false)
    5243                 :     7017643 :       || NEXT_INSN (from) != to
    5244                 :     4104543 :       || !NONDEBUG_INSN_P (to)
    5245                 :    11122186 :       || CALL_P (to))
    5246                 :             :     return false;
    5247                 :             : 
    5248                 :     4099330 :   lra_insn_recog_data_t id = lra_get_insn_recog_data (to);
    5249                 :     4099330 :   struct lra_static_insn_data *static_id = id->insn_static_data;
    5250                 :             : 
    5251                 :     4099330 :   if (id->used_insn_alternative == LRA_UNKNOWN_ALT
    5252                 :     4099330 :       || (set = single_set (from)) == NULL_RTX)
    5253                 :       28116 :     return false;
    5254                 :     4071214 :   from_reg = SET_DEST (set);
    5255                 :     4071214 :   to_reg = SET_SRC (set);
    5256                 :             :   /* Ignore optional reloads: */
    5257                 :     3989108 :   if (! REG_P (from_reg) || ! REG_P (to_reg)
    5258                 :     6810344 :       || bitmap_bit_p (&lra_optional_reload_pseudos, REGNO (from_reg)))
    5259                 :     1876018 :     return false;
    5260                 :     2195196 :   to_class = lra_get_allocno_class (REGNO (to_reg));
    5261                 :     2195196 :   from_class = lra_get_allocno_class (REGNO (from_reg));
    5262                 :             :   /* Check that reload insn is a load:  */
    5263                 :     2195196 :   if (to_class != NO_REGS || from_class == NO_REGS)
    5264                 :             :     return false;
    5265                 :       40802 :   for (n = nop = 0; nop < static_id->n_operands; nop++)
    5266                 :             :     {
    5267                 :       29004 :       if (static_id->operand[nop].type != OP_IN)
    5268                 :       10677 :         continue;
    5269                 :       18327 :       op = *id->operand_loc[nop];
    5270                 :       18327 :       if (!REG_P (op) || REGNO (op) != REGNO (from_reg))
    5271                 :        6718 :         continue;
    5272                 :       11609 :       *id->operand_loc[nop] = to_reg;
    5273                 :       11609 :       changed_nops[n++] = nop;
    5274                 :             :     }
    5275                 :       11798 :   changed_nops[n] = -1;
    5276                 :       11798 :   lra_update_dups (id, changed_nops);
    5277                 :       11798 :   lra_update_insn_regno_info (to);
    5278                 :       11798 :   ok_p = recog_memoized (to) >= 0;
    5279                 :       11798 :   if (ok_p)
    5280                 :             :     {
    5281                 :             :       /* Check that combined insn does not need any reloads: */
    5282                 :       11776 :       saved_insn = curr_insn;
    5283                 :       11776 :       curr_insn = to;
    5284                 :       11776 :       curr_id = lra_get_insn_recog_data (curr_insn);
    5285                 :       11776 :       curr_static_id = curr_id->insn_static_data;
    5286                 :       11776 :       for (bool swapped_p = false;;)
    5287                 :             :         {
    5288                 :       13705 :           ok_p = !curr_insn_transform (true);
    5289                 :       13705 :           if (ok_p || curr_static_id->commutative < 0)
    5290                 :             :             break;
    5291                 :        3858 :           swap_operands (curr_static_id->commutative);
    5292                 :        3858 :           if (lra_dump_file != NULL)
    5293                 :             :             {
    5294                 :           0 :               fprintf (lra_dump_file,
    5295                 :             :                        "    Swapping %scombined insn operands:\n",
    5296                 :             :                        swapped_p ? "back " : "");
    5297                 :           0 :               dump_insn_slim (lra_dump_file, to);
    5298                 :             :             }
    5299                 :        3858 :           if (swapped_p)
    5300                 :             :             break;
    5301                 :             :           swapped_p = true;
    5302                 :             :         }
    5303                 :       11776 :       curr_insn = saved_insn;
    5304                 :       11776 :       curr_id = lra_get_insn_recog_data (curr_insn);
    5305                 :       11776 :       curr_static_id = curr_id->insn_static_data;
    5306                 :             :     }
    5307                 :       11798 :   if (ok_p)
    5308                 :             :     {
    5309                 :        2781 :       id->used_insn_alternative = -1;
    5310                 :        2781 :       lra_push_insn_and_update_insn_regno_info (to);
    5311                 :        2781 :       if (lra_dump_file != NULL)
    5312                 :             :         {
    5313                 :           0 :           fprintf (lra_dump_file, "    Use combined insn:\n");
    5314                 :           0 :           dump_insn_slim (lra_dump_file, to);
    5315                 :             :         }
    5316                 :        2781 :       return true;
    5317                 :             :     }
    5318                 :        9017 :   if (lra_dump_file != NULL)
    5319                 :             :     {
    5320                 :           0 :       fprintf (lra_dump_file, "    Failed combined insn:\n");
    5321                 :           0 :       dump_insn_slim (lra_dump_file, to);
    5322                 :             :     }
    5323                 :       18306 :   for (int i = 0; i < n; i++)
    5324                 :             :     {
    5325                 :        9289 :       nop = changed_nops[i];
    5326                 :        9289 :       *id->operand_loc[nop] = from_reg;
    5327                 :             :     }
    5328                 :        9017 :   lra_update_dups (id, changed_nops);
    5329                 :        9017 :   lra_update_insn_regno_info (to);
    5330                 :        9017 :   if (lra_dump_file != NULL)
    5331                 :             :     {
    5332                 :           0 :       fprintf (lra_dump_file, "    Restoring insn after failed combining:\n");
    5333                 :           0 :       dump_insn_slim (lra_dump_file, to);
    5334                 :             :     }
    5335                 :             :   return false;
    5336                 :             : }
    5337                 :             : 
    5338                 :             : /* Entry function of LRA constraint pass.  Return true if the
    5339                 :             :    constraint pass did change the code.  */
    5340                 :             : bool
    5341                 :     3127059 : lra_constraints (bool first_p)
    5342                 :             : {
    5343                 :     3127059 :   bool changed_p;
    5344                 :     3127059 :   int i, hard_regno, new_insns_num;
    5345                 :     3127059 :   unsigned int min_len, new_min_len, uid;
    5346                 :     3127059 :   rtx set, x, reg, nosubreg_dest;
    5347                 :     3127059 :   rtx_insn *original_insn;
    5348                 :     3127059 :   basic_block last_bb;
    5349                 :     3127059 :   bitmap_iterator bi;
    5350                 :             : 
    5351                 :     3127059 :   lra_constraint_iter++;
    5352                 :     3127059 :   if (lra_dump_file != NULL)
    5353                 :         194 :     fprintf (lra_dump_file, "\n********** Local #%d: **********\n\n",
    5354                 :             :              lra_constraint_iter);
    5355                 :     3127059 :   changed_p = false;
    5356                 :     3127059 :   if (pic_offset_table_rtx
    5357                 :     3127059 :       && REGNO (pic_offset_table_rtx) >= FIRST_PSEUDO_REGISTER)
    5358                 :      102297 :     check_and_force_assignment_correctness_p = true;
    5359                 :     3024762 :   else if (first_p)
    5360                 :             :     /* On the first iteration we should check IRA assignment
    5361                 :             :        correctness.  In rare cases, the assignments can be wrong as
    5362                 :             :        early clobbers operands are ignored in IRA or usages of
    5363                 :             :        paradoxical sub-registers are not taken into account by
    5364                 :             :        IRA.  */
    5365                 :     1396208 :     check_and_force_assignment_correctness_p = true;
    5366                 :     3127059 :   new_insn_uid_start = get_max_uid ();
    5367                 :     3127059 :   new_regno_start = first_p ? lra_constraint_new_regno_start : max_reg_num ();
    5368                 :             :   /* Mark used hard regs for target stack size calulations.  */
    5369                 :   197005579 :   for (i = FIRST_PSEUDO_REGISTER; i < new_regno_start; i++)
    5370                 :   193878520 :     if (lra_reg_info[i].nrefs != 0
    5371                 :   286714936 :         && (hard_regno = lra_get_regno_hard_regno (i)) >= 0)
    5372                 :             :       {
    5373                 :    89193453 :         int j, nregs;
    5374                 :             : 
    5375                 :    89193453 :         nregs = hard_regno_nregs (hard_regno, lra_reg_info[i].biggest_mode);
    5376                 :   181407109 :         for (j = 0; j < nregs; j++)
    5377                 :    92213656 :           df_set_regs_ever_live (hard_regno + j, true);
    5378                 :             :       }
    5379                 :             :   /* Do elimination before the equivalence processing as we can spill
    5380                 :             :      some pseudos during elimination.  */
    5381                 :     3127059 :   lra_eliminate (false, first_p);
    5382                 :     3127059 :   auto_bitmap equiv_insn_bitmap (&reg_obstack);
    5383                 :   197005579 :   for (i = FIRST_PSEUDO_REGISTER; i < new_regno_start; i++)
    5384                 :   193878520 :     if (lra_reg_info[i].nrefs != 0)
    5385                 :             :       {
    5386                 :    92836416 :         ira_reg_equiv[i].profitable_p = true;
    5387                 :    92836416 :         reg = regno_reg_rtx[i];
    5388                 :    92836416 :         if (lra_get_regno_hard_regno (i) < 0 && (x = get_equiv (reg)) != reg)
    5389                 :             :           {
    5390                 :      665265 :             bool pseudo_p = contains_reg_p (x, false, false);
    5391                 :             : 
    5392                 :             :             /* After RTL transformation, we cannot guarantee that
    5393                 :             :                pseudo in the substitution was not reloaded which might
    5394                 :             :                make equivalence invalid.  For example, in reverse
    5395                 :             :                equiv of p0
    5396                 :             : 
    5397                 :             :                p0 <- ...
    5398                 :             :                ...
    5399                 :             :                equiv_mem <- p0
    5400                 :             : 
    5401                 :             :                the memory address register was reloaded before the 2nd
    5402                 :             :                insn.  */
    5403                 :      665265 :             if ((! first_p && pseudo_p)
    5404                 :             :                 /* We don't use DF for compilation speed sake.  So it
    5405                 :             :                    is problematic to update live info when we use an
    5406                 :             :                    equivalence containing pseudos in more than one
    5407                 :             :                    BB.  */
    5408                 :      660052 :                 || (pseudo_p && multi_block_pseudo_p (i))
    5409                 :             :                 /* If an init insn was deleted for some reason, cancel
    5410                 :             :                    the equiv.  We could update the equiv insns after
    5411                 :             :                    transformations including an equiv insn deletion
    5412                 :             :                    but it is not worthy as such cases are extremely
    5413                 :             :                    rare.  */
    5414                 :      655321 :                 || contains_deleted_insn_p (ira_reg_equiv[i].init_insns)
    5415                 :             :                 /* If it is not a reverse equivalence, we check that a
    5416                 :             :                    pseudo in rhs of the init insn is not dying in the
    5417                 :             :                    insn.  Otherwise, the live info at the beginning of
    5418                 :             :                    the corresponding BB might be wrong after we
    5419                 :             :                    removed the insn.  When the equiv can be a
    5420                 :             :                    constant, the right hand side of the init insn can
    5421                 :             :                    be a pseudo.  */
    5422                 :      655321 :                 || (! reverse_equiv_p (i)
    5423                 :      654003 :                     && (init_insn_rhs_dead_pseudo_p (i)
    5424                 :             :                         /* If we reloaded the pseudo in an equivalence
    5425                 :             :                            init insn, we cannot remove the equiv init
    5426                 :             :                            insns and the init insns might write into
    5427                 :             :                            const memory in this case.  */
    5428                 :      647862 :                         || contains_reloaded_insn_p (i)))
    5429                 :             :                 /* Prevent access beyond equivalent memory for
    5430                 :             :                    paradoxical subregs.  */
    5431                 :      649180 :                 || (MEM_P (x)
    5432                 :     1073877 :                     && maybe_gt (GET_MODE_SIZE (lra_reg_info[i].biggest_mode),
    5433                 :             :                                  GET_MODE_SIZE (GET_MODE (x))))
    5434                 :     1314318 :                 || (pic_offset_table_rtx
    5435                 :       41581 :                     && ((CONST_POOL_OK_P (PSEUDO_REGNO_MODE (i), x)
    5436                 :        4602 :                          && (targetm.preferred_reload_class
    5437                 :        2301 :                              (x, lra_get_allocno_class (i)) == NO_REGS))
    5438                 :       40810 :                         || contains_symbol_ref_p (x))))
    5439                 :       17802 :               ira_reg_equiv[i].defined_p
    5440                 :       17802 :                 = ira_reg_equiv[i].caller_save_p = false;
    5441                 :      665265 :             if (contains_reg_p (x, false, true))
    5442                 :        8127 :               ira_reg_equiv[i].profitable_p = false;
    5443                 :      665265 :             if (get_equiv (reg) != reg)
    5444                 :      643366 :               bitmap_ior_into (equiv_insn_bitmap, &lra_reg_info[i].insn_bitmap);
    5445                 :             :           }
    5446                 :             :       }
    5447                 :   197005579 :   for (i = FIRST_PSEUDO_REGISTER; i < new_regno_start; i++)
    5448                 :   193878520 :     update_equiv (i);
    5449                 :             :   /* We should add all insns containing pseudos which should be
    5450                 :             :      substituted by their equivalences.  */
    5451                 :     5208382 :   EXECUTE_IF_SET_IN_BITMAP (equiv_insn_bitmap, 0, uid, bi)
    5452                 :     2081323 :     lra_push_insn_by_uid (uid);
    5453                 :     3127059 :   min_len = lra_insn_stack_length ();
    5454                 :     3127059 :   new_insns_num = 0;
    5455                 :     3127059 :   last_bb = NULL;
    5456                 :     3127059 :   changed_p = false;
    5457                 :     3127059 :   original_insn = NULL;
    5458                 :   154561398 :   while ((new_min_len = lra_insn_stack_length ()) != 0)
    5459                 :             :     {
    5460                 :   148307280 :       curr_insn = lra_pop_insn ();
    5461                 :   148307280 :       --new_min_len;
    5462                 :   148307280 :       curr_bb = BLOCK_FOR_INSN (curr_insn);
    5463                 :   148307280 :       if (curr_bb != last_bb)
    5464                 :             :         {
    5465                 :    19579799 :           last_bb = curr_bb;
    5466                 :    19579799 :           bb_reload_num = lra_curr_reload_num;
    5467                 :             :         }
    5468                 :   148307280 :       if (min_len > new_min_len)
    5469                 :             :         {
    5470                 :             :           min_len = new_min_len;
    5471                 :             :           new_insns_num = 0;
    5472                 :             :           original_insn = curr_insn;
    5473                 :             :         }
    5474                 :     7017643 :       else if (combine_reload_insn (curr_insn, original_insn))
    5475                 :             :         {
    5476                 :        2781 :           continue;
    5477                 :             :         }
    5478                 :     7014862 :       if (new_insns_num > MAX_RELOAD_INSNS_NUMBER)
    5479                 :           0 :         internal_error
    5480                 :           0 :           ("maximum number of generated reload insns per insn achieved (%d)",
    5481                 :             :            MAX_RELOAD_INSNS_NUMBER);
    5482                 :   148304499 :       new_insns_num++;
    5483                 :   148304499 :       if (DEBUG_INSN_P (curr_insn))
    5484                 :             :         {
    5485                 :             :           /* We need to check equivalence in debug insn and change
    5486                 :             :              pseudo to the equivalent value if necessary.  */
    5487                 :    44926541 :           curr_id = lra_get_insn_recog_data (curr_insn);
    5488                 :    44926541 :           if (bitmap_bit_p (equiv_insn_bitmap, INSN_UID (curr_insn)))
    5489                 :             :             {
    5490                 :       27166 :               rtx old = *curr_id->operand_loc[0];
    5491                 :       27166 :               *curr_id->operand_loc[0]
    5492                 :       27166 :                 = simplify_replace_fn_rtx (old, NULL_RTX,
    5493                 :             :                                            loc_equivalence_callback, curr_insn);
    5494                 :       27166 :               if (old != *curr_id->operand_loc[0])
    5495                 :             :                 {
    5496                 :             :                   /* If we substitute pseudo by shared equivalence, we can fail
    5497                 :             :                      to update LRA reg info and this can result in many
    5498                 :             :                      unexpected consequences.  So keep rtl unshared:  */
    5499                 :       27166 :                   *curr_id->operand_loc[0]
    5500                 :       27166 :                     = copy_rtx (*curr_id->operand_loc[0]);
    5501                 :       27166 :                   lra_update_insn_regno_info (curr_insn);
    5502                 :       27166 :                   changed_p = true;
    5503                 :             :                 }
    5504                 :             :             }
    5505                 :             :         }
    5506                 :   103377958 :       else if (INSN_P (curr_insn))
    5507                 :             :         {
    5508                 :   102333302 :           if ((set = single_set (curr_insn)) != NULL_RTX)
    5509                 :             :             {
    5510                 :    97111171 :               nosubreg_dest = SET_DEST (set);
    5511                 :             :               /* The equivalence pseudo could be set up as SUBREG in a
    5512                 :             :                  case when it is a call restore insn in a mode
    5513                 :             :                  different from the pseudo mode.  */
    5514                 :    97111171 :               if (GET_CODE (nosubreg_dest) == SUBREG)
    5515                 :     1189628 :                 nosubreg_dest = SUBREG_REG (nosubreg_dest);
    5516                 :    97741234 :               if ((REG_P (nosubreg_dest)
    5517                 :    72093533 :                    && (x = get_equiv (nosubreg_dest)) != nosubreg_dest
    5518                 :             :                    /* Remove insns which set up a pseudo whose value
    5519                 :             :                       cannot be changed.  Such insns might be not in
    5520                 :             :                       init_insns because we don't update equiv data
    5521                 :             :                       during insn transformations.
    5522                 :             : 
    5523                 :             :                       As an example, let suppose that a pseudo got
    5524                 :             :                       hard register and on the 1st pass was not
    5525                 :             :                       changed to equivalent constant.  We generate an
    5526                 :             :                       additional insn setting up the pseudo because of
    5527                 :             :                       secondary memory movement.  Then the pseudo is
    5528                 :             :                       spilled and we use the equiv constant.  In this
    5529                 :             :                       case we should remove the additional insn and
    5530                 :             :                       this insn is not init_insns list.  */
    5531                 :      647742 :                    && (! MEM_P (x) || MEM_READONLY_P (x)
    5532                 :             :                        /* Check that this is actually an insn setting
    5533                 :             :                           up the equivalence.  */
    5534                 :      307294 :                        || in_list_p (curr_insn,
    5535                 :      307294 :                                      ira_reg_equiv
    5536                 :      307294 :                                      [REGNO (nosubreg_dest)].init_insns)))
    5537                 :   168575890 :                   || (((x = get_equiv (SET_SRC (set))) != SET_SRC (set))
    5538                 :     1772764 :                       && in_list_p (curr_insn,
    5539                 :      886382 :                                     ira_reg_equiv
    5540                 :      886382 :                                     [REGNO (SET_SRC (set))].init_insns)
    5541                 :             :                       /* This is a reverse equivalence to memory (see ira.cc)
    5542                 :             :                          in store insn.  We can reload all the destination and
    5543                 :             :                          have an output reload which is a store to memory.  If
    5544                 :             :                          we just remove the insn, we will have the output
    5545                 :             :                          reload storing an undefined value to the memory.
    5546                 :             :                          Check that we did not reload the memory to prevent a
    5547                 :             :                          wrong code generation.  We could implement using the
    5548                 :             :                          equivalence still in such case but doing this is not
    5549                 :             :                          worth the efforts as such case is very rare.  */
    5550                 :        1249 :                       && MEM_P (nosubreg_dest)))
    5551                 :             :                 {
    5552                 :             :                   /* This is equiv init insn of pseudo which did not get a
    5553                 :             :                      hard register -- remove the insn.  */
    5554                 :      630063 :                   if (lra_dump_file != NULL)
    5555                 :             :                     {
    5556                 :           8 :                       fprintf (lra_dump_file,
    5557                 :             :                                "      Removing equiv init insn %i (freq=%d)\n",
    5558                 :           4 :                                INSN_UID (curr_insn),
    5559                 :           8 :                                REG_FREQ_FROM_BB (BLOCK_FOR_INSN (curr_insn)));
    5560                 :           4 :                       dump_insn_slim (lra_dump_file, curr_insn);
    5561                 :             :                     }
    5562                 :      630063 :                   if (contains_reg_p (x, true, false))
    5563                 :      132187 :                     check_and_force_assignment_correctness_p = true;
    5564                 :      630063 :                   lra_set_insn_deleted (curr_insn);
    5565                 :      630063 :                   continue;
    5566                 :             :                 }
    5567                 :             :             }
    5568                 :   101703239 :           curr_id = lra_get_insn_recog_data (curr_insn);
    5569                 :   101703239 :           curr_static_id = curr_id->insn_static_data;
    5570                 :   101703239 :           init_curr_insn_input_reloads ();
    5571                 :   101703239 :           init_curr_operand_mode ();
    5572                 :   101703239 :           if (curr_insn_transform (false))
    5573                 :             :             changed_p = true;
    5574                 :             :           /* Check non-transformed insns too for equiv change as USE
    5575                 :             :              or CLOBBER don't need reloads but can contain pseudos
    5576                 :             :              being changed on their equivalences.  */
    5577                 :    95947184 :           else if (bitmap_bit_p (equiv_insn_bitmap, INSN_UID (curr_insn))
    5578                 :    95947184 :                    && loc_equivalence_change_p (&PATTERN (curr_insn)))
    5579                 :             :             {
    5580                 :           5 :               lra_update_insn_regno_info (curr_insn);
    5581                 :           5 :               changed_p = true;
    5582                 :             :             }
    5583                 :             :         }
    5584                 :             :     }
    5585                 :             : 
    5586                 :             :   /* If we used a new hard regno, changed_p should be true because the
    5587                 :             :      hard reg is assigned to a new pseudo.  */
    5588                 :     3127059 :   if (flag_checking && !changed_p)
    5589                 :             :     {
    5590                 :   126850578 :       for (i = FIRST_PSEUDO_REGISTER; i < new_regno_start; i++)
    5591                 :   124312626 :         if (lra_reg_info[i].nrefs != 0
    5592                 :   182000410 :             && (hard_regno = lra_get_regno_hard_regno (i)) >= 0)
    5593                 :             :           {
    5594                 :    56356166 :             int j, nregs = hard_regno_nregs (hard_regno,
    5595                 :    56356166 :                                              PSEUDO_REGNO_MODE (i));
    5596                 :             : 
    5597                 :   114711826 :             for (j = 0; j < nregs; j++)
    5598                 :    58355660 :               lra_assert (df_regs_ever_live_p (hard_regno + j));
    5599                 :             :           }
    5600                 :             :     }
    5601                 :     2537992 :   if (changed_p)
    5602                 :      589070 :     lra_dump_insns_if_possible ("changed func after local");
    5603                 :     3127059 :   return changed_p;
    5604                 :     3127059 : }
    5605                 :             : 
    5606                 :             : static void initiate_invariants (void);
    5607                 :             : static void finish_invariants (void);
    5608                 :             : 
    5609                 :             : /* Initiate the LRA constraint pass.  It is done once per
    5610                 :             :    function.  */
    5611                 :             : void
    5612                 :     1435841 : lra_constraints_init (void)
    5613                 :             : {
    5614                 :     1435841 :   initiate_invariants ();
    5615                 :     1435841 : }
    5616                 :             : 
    5617                 :             : /* Finalize the LRA constraint pass.  It is done once per
    5618                 :             :    function.  */
    5619                 :             : void
    5620                 :     1435841 : lra_constraints_finish (void)
    5621                 :             : {
    5622                 :     1435841 :   finish_invariants ();
    5623                 :     1435841 : }
    5624                 :             : 
    5625                 :             : 
    5626                 :             : 
    5627                 :             : /* Structure describes invariants for ineheritance.  */
    5628                 :             : struct lra_invariant
    5629                 :             : {
    5630                 :             :   /* The order number of the invariant.  */
    5631                 :             :   int num;
    5632                 :             :   /* The invariant RTX.  */
    5633                 :             :   rtx invariant_rtx;
    5634                 :             :   /* The origin insn of the invariant.  */
    5635                 :             :   rtx_insn *insn;
    5636                 :             : };
    5637                 :             : 
    5638                 :             : typedef lra_invariant invariant_t;
    5639                 :             : typedef invariant_t *invariant_ptr_t;
    5640                 :             : typedef const invariant_t *const_invariant_ptr_t;
    5641                 :             : 
    5642                 :             : /* Pointer to the inheritance invariants.  */
    5643                 :             : static vec<invariant_ptr_t> invariants;
    5644                 :             : 
    5645                 :             : /* Allocation pool for the invariants.  */
    5646                 :             : static object_allocator<lra_invariant> *invariants_pool;
    5647                 :             : 
    5648                 :             : /* Hash table for the invariants.  */
    5649                 :             : static htab_t invariant_table;
    5650                 :             : 
    5651                 :             : /* Hash function for INVARIANT.  */
    5652                 :             : static hashval_t
    5653                 :      170582 : invariant_hash (const void *invariant)
    5654                 :             : {
    5655                 :      170582 :   rtx inv = ((const_invariant_ptr_t) invariant)->invariant_rtx;
    5656                 :      170582 :   return lra_rtx_hash (inv);
    5657                 :             : }
    5658                 :             : 
    5659                 :             : /* Equal function for invariants INVARIANT1 and INVARIANT2.  */
    5660                 :             : static int
    5661                 :       56915 : invariant_eq_p (const void *invariant1, const void *invariant2)
    5662                 :             : {
    5663                 :       56915 :   rtx inv1 = ((const_invariant_ptr_t) invariant1)->invariant_rtx;
    5664                 :       56915 :   rtx inv2 = ((const_invariant_ptr_t) invariant2)->invariant_rtx;
    5665                 :             : 
    5666                 :       56915 :   return rtx_equal_p (inv1, inv2);
    5667                 :             : }
    5668                 :             : 
    5669                 :             : /* Insert INVARIANT_RTX into the table if it is not there yet.  Return
    5670                 :             :    invariant which is in the table.  */
    5671                 :             : static invariant_ptr_t
    5672                 :      170390 : insert_invariant (rtx invariant_rtx)
    5673                 :             : {
    5674                 :      170390 :   void **entry_ptr;
    5675                 :      170390 :   invariant_t invariant;
    5676                 :      170390 :   invariant_ptr_t invariant_ptr;
    5677                 :             : 
    5678                 :      170390 :   invariant.invariant_rtx = invariant_rtx;
    5679                 :      170390 :   entry_ptr = htab_find_slot (invariant_table, &invariant, INSERT);
    5680                 :      170390 :   if (*entry_ptr == NULL)
    5681                 :             :     {
    5682                 :      144935 :       invariant_ptr = invariants_pool->allocate ();
    5683                 :      144935 :       invariant_ptr->invariant_rtx = invariant_rtx;
    5684                 :      144935 :       invariant_ptr->insn = NULL;
    5685                 :      144935 :       invariants.safe_push (invariant_ptr);
    5686                 :      144935 :       *entry_ptr = (void *) invariant_ptr;
    5687                 :             :     }
    5688                 :      170390 :   return (invariant_ptr_t) *entry_ptr;
    5689                 :             : }
    5690                 :             : 
    5691                 :             : /* Initiate the invariant table.  */
    5692                 :             : static void
    5693                 :     1435841 : initiate_invariants (void)
    5694                 :             : {
    5695                 :     1435841 :   invariants.create (100);
    5696                 :     1435841 :   invariants_pool
    5697                 :     1435841 :     = new object_allocator<lra_invariant> ("Inheritance invariants");
    5698                 :     1435841 :   invariant_table = htab_create (100, invariant_hash, invariant_eq_p, NULL);
    5699                 :     1435841 : }
    5700                 :             : 
    5701                 :             : /* Finish the invariant table.  */
    5702                 :             : static void
    5703                 :     1435841 : finish_invariants (void)
    5704                 :             : {
    5705                 :     1435841 :   htab_delete (invariant_table);
    5706                 :     2871682 :   delete invariants_pool;
    5707                 :     1435841 :   invariants.release ();
    5708                 :     1435841 : }
    5709                 :             : 
    5710                 :             : /* Make the invariant table empty.  */
    5711                 :             : static void
    5712                 :    12023188 : clear_invariants (void)
    5713                 :             : {
    5714                 :    12023188 :   htab_empty (invariant_table);
    5715                 :    12023188 :   invariants_pool->release ();
    5716                 :    12023188 :   invariants.truncate (0);
    5717                 :    12023188 : }
    5718                 :             : 
    5719                 :             : 
    5720                 :             : 
    5721                 :             : /* This page contains code to do inheritance/split
    5722                 :             :    transformations.  */
    5723                 :             : 
    5724                 :             : /* Number of reloads passed so far in current EBB.  */
    5725                 :             : static int reloads_num;
    5726                 :             : 
    5727                 :             : /* Number of calls passed so far in current EBB.  */
    5728                 :             : static int calls_num;
    5729                 :             : 
    5730                 :             : /* Index ID is the CALLS_NUM associated the last call we saw with
    5731                 :             :    ABI identifier ID.  */
    5732                 :             : static int last_call_for_abi[NUM_ABI_IDS];
    5733                 :             : 
    5734                 :             : /* Which registers have been fully or partially clobbered by a call
    5735                 :             :    since they were last used.  */
    5736                 :             : static HARD_REG_SET full_and_partial_call_clobbers;
    5737                 :             : 
    5738                 :             : /* Current reload pseudo check for validity of elements in
    5739                 :             :    USAGE_INSNS.  */
    5740                 :             : static int curr_usage_insns_check;
    5741                 :             : 
    5742                 :             : /* Info about last usage of registers in EBB to do inheritance/split
    5743                 :             :    transformation.  Inheritance transformation is done from a spilled
    5744                 :             :    pseudo and split transformations from a hard register or a pseudo
    5745                 :             :    assigned to a hard register.  */
    5746                 :             : struct usage_insns
    5747                 :             : {
    5748                 :             :   /* If the value is equal to CURR_USAGE_INSNS_CHECK, then the member
    5749                 :             :      value INSNS is valid.  The insns is chain of optional debug insns
    5750                 :             :      and a finishing non-debug insn using the corresponding reg.  The
    5751                 :             :      value is also used to mark the registers which are set up in the
    5752                 :             :      current insn.  The negated insn uid is used for this.  */
    5753                 :             :   int check;
    5754                 :             :   /* Value of global reloads_num at the last insn in INSNS.  */
    5755                 :             :   int reloads_num;
    5756                 :             :   /* Value of global reloads_nums at the last insn in INSNS.  */
    5757                 :             :   int calls_num;
    5758                 :             :   /* It can be true only for splitting.  And it means that the restore
    5759                 :             :      insn should be put after insn given by the following member.  */
    5760                 :             :   bool after_p;
    5761                 :             :   /* Next insns in the current EBB which use the original reg and the
    5762                 :             :      original reg value is not changed between the current insn and
    5763                 :             :      the next insns.  In order words, e.g. for inheritance, if we need
    5764                 :             :      to use the original reg value again in the next insns we can try
    5765                 :             :      to use the value in a hard register from a reload insn of the
    5766                 :             :      current insn.  */
    5767                 :             :   rtx insns;
    5768                 :             : };
    5769                 :             : 
    5770                 :             : /* Map: regno -> corresponding pseudo usage insns.  */
    5771                 :             : static struct usage_insns *usage_insns;
    5772                 :             : 
    5773                 :             : static void
    5774                 :   231150574 : setup_next_usage_insn (int regno, rtx insn, int reloads_num, bool after_p)
    5775                 :             : {
    5776                 :   231150574 :   usage_insns[regno].check = curr_usage_insns_check;
    5777                 :   231150574 :   usage_insns[regno].insns = insn;
    5778                 :   231150574 :   usage_insns[regno].reloads_num = reloads_num;
    5779                 :   231150574 :   usage_insns[regno].calls_num = calls_num;
    5780                 :   231150574 :   usage_insns[regno].after_p = after_p;
    5781                 :   231150574 :   if (regno >= FIRST_PSEUDO_REGISTER && reg_renumber[regno] >= 0)
    5782                 :   103056645 :     remove_from_hard_reg_set (&full_and_partial_call_clobbers,
    5783                 :   103056645 :                               PSEUDO_REGNO_MODE (regno),
    5784                 :             :                               reg_renumber[regno]);
    5785                 :   231150574 : }
    5786                 :             : 
    5787                 :             : /* The function is used to form list REGNO usages which consists of
    5788                 :             :    optional debug insns finished by a non-debug insn using REGNO.
    5789                 :             :    RELOADS_NUM is current number of reload insns processed so far.  */
    5790                 :             : static void
    5791                 :   129994572 : add_next_usage_insn (int regno, rtx_insn *insn, int reloads_num)
    5792                 :             : {
    5793                 :   129994572 :   rtx next_usage_insns;
    5794                 :             : 
    5795                 :   129994572 :   if (usage_insns[regno].check == curr_usage_insns_check
    5796                 :    65862917 :       && (next_usage_insns = usage_insns[regno].insns) != NULL_RTX
    5797                 :   195857489 :       && DEBUG_INSN_P (insn))
    5798                 :             :     {
    5799                 :             :       /* Check that we did not add the debug insn yet.  */
    5800                 :    11764161 :       if (next_usage_insns != insn
    5801                 :    11764161 :           && (GET_CODE (next_usage_insns) != INSN_LIST
    5802                 :     4874185 :               || XEXP (next_usage_insns, 0) != insn))
    5803                 :    11764147 :         usage_insns[regno].insns = gen_rtx_INSN_LIST (VOIDmode, insn,
    5804                 :             :                                                       next_usage_insns);
    5805                 :             :     }
    5806                 :   118230411 :   else if (NONDEBUG_INSN_P (insn))
    5807                 :   117718799 :     setup_next_usage_insn (regno, insn, reloads_num, false);
    5808                 :             :   else
    5809                 :      511612 :     usage_insns[regno].check = 0;
    5810                 :   129994572 : }
    5811                 :             : 
    5812                 :             : /* Return first non-debug insn in list USAGE_INSNS.  */
    5813                 :             : static rtx_insn *
    5814                 :     1119049 : skip_usage_debug_insns (rtx usage_insns)
    5815                 :             : {
    5816                 :     1119049 :   rtx insn;
    5817                 :             : 
    5818                 :             :   /* Skip debug insns.  */
    5819                 :     1119049 :   for (insn = usage_insns;
    5820                 :     1371282 :        insn != NULL_RTX && GET_CODE (insn) == INSN_LIST;
    5821                 :      252233 :        insn = XEXP (insn, 1))
    5822                 :             :     ;
    5823                 :     1119049 :   return safe_as_a <rtx_insn *> (insn);
    5824                 :             : }
    5825                 :             : 
    5826                 :             : /* Return true if we need secondary memory moves for insn in
    5827                 :             :    USAGE_INSNS after inserting inherited pseudo of class INHER_CL
    5828                 :             :    into the insn.  */
    5829                 :             : static bool
    5830                 :     1119059 : check_secondary_memory_needed_p (enum reg_class inher_cl ATTRIBUTE_UNUSED,
    5831                 :             :                                  rtx usage_insns ATTRIBUTE_UNUSED)
    5832                 :             : {
    5833                 :     1119059 :   rtx_insn *insn;
    5834                 :     1119059 :   rtx set, dest;
    5835                 :     1119059 :   enum reg_class cl;
    5836                 :             : 
    5837                 :     1119059 :   if (inher_cl == ALL_REGS
    5838                 :     1119059 :       || (insn = skip_usage_debug_insns (usage_insns)) == NULL_RTX)
    5839                 :             :     return false;
    5840                 :     1119049 :   lra_assert (INSN_P (insn));
    5841                 :     1119049 :   if ((set = single_set (insn)) == NULL_RTX || ! REG_P (SET_DEST (set)))
    5842                 :             :     return false;
    5843                 :     1076705 :   dest = SET_DEST (set);
    5844                 :     1076705 :   if (! REG_P (dest))
    5845                 :             :     return false;
    5846                 :     1076705 :   lra_assert (inher_cl != NO_REGS);
    5847                 :     1076705 :   cl = get_reg_class (REGNO (dest));
    5848                 :     1076705 :   return (cl != NO_REGS && cl != ALL_REGS
    5849                 :     1076705 :           && targetm.secondary_memory_needed (GET_MODE (dest), inher_cl, cl));
    5850                 :             : }
    5851                 :             : 
    5852                 :             : /* Registers involved in inheritance/split in the current EBB
    5853                 :             :    (inheritance/split pseudos and original registers).  */
    5854                 :             : static bitmap_head check_only_regs;
    5855                 :             : 
    5856                 :             : /* Reload pseudos cannot be involded in invariant inheritance in the
    5857                 :             :    current EBB.  */
    5858                 :             : static bitmap_head invalid_invariant_regs;
    5859                 :             : 
    5860                 :             : /* Do inheritance transformations for insn INSN, which defines (if
    5861                 :             :    DEF_P) or uses ORIGINAL_REGNO.  NEXT_USAGE_INSNS specifies which
    5862                 :             :    instruction in the EBB next uses ORIGINAL_REGNO; it has the same
    5863                 :             :    form as the "insns" field of usage_insns.  Return true if we
    5864                 :             :    succeed in such transformation.
    5865                 :             : 
    5866                 :             :    The transformations look like:
    5867                 :             : 
    5868                 :             :      p <- ...                  i <- ...
    5869                 :             :      ...                  p <- i    (new insn)
    5870                 :             :      ...             =>
    5871                 :             :      <- ... p ...      <- ... i ...
    5872                 :             :    or
    5873                 :             :      ...                  i <- p    (new insn)
    5874                 :             :      <- ... p ...      <- ... i ...
    5875                 :             :      ...             =>
    5876                 :             :      <- ... p ...      <- ... i ...
    5877                 :             :    where p is a spilled original pseudo and i is a new inheritance pseudo.
    5878                 :             : 
    5879                 :             : 
    5880                 :             :    The inheritance pseudo has the smallest class of two classes CL and
    5881                 :             :    class of ORIGINAL REGNO.  */
    5882                 :             : static bool
    5883                 :     1214211 : inherit_reload_reg (bool def_p, int original_regno,
    5884                 :             :                     enum reg_class cl, rtx_insn *insn, rtx next_usage_insns)
    5885                 :             : {
    5886                 :     1214211 :   if (optimize_function_for_size_p (cfun))
    5887                 :             :     return false;
    5888                 :             : 
    5889                 :     1179202 :   enum reg_class rclass = lra_get_allocno_class (original_regno);
    5890                 :     1179202 :   rtx original_reg = regno_reg_rtx[original_regno];
    5891                 :     1179202 :   rtx new_reg, usage_insn;
    5892                 :     1179202 :   rtx_insn *new_insns;
    5893                 :             : 
    5894                 :     1179202 :   lra_assert (! usage_insns[original_regno].after_p);
    5895                 :     1179202 :   if (lra_dump_file != NULL)
    5896                 :           0 :     fprintf (lra_dump_file,
    5897                 :             :              "    <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
    5898                 :     1179202 :   if (! ira_reg_classes_intersect_p[cl][rclass])
    5899                 :             :     {
    5900                 :       60143 :       if (lra_dump_file != NULL)
    5901                 :             :         {
    5902                 :           0 :           fprintf (lra_dump_file,
    5903                 :             :                    "    Rejecting inheritance for %d "
    5904                 :             :                    "because of disjoint classes %s and %s\n",
    5905                 :             :                    original_regno, reg_class_names[cl],
    5906                 :             :                    reg_class_names[rclass]);
    5907                 :           0 :           fprintf (lra_dump_file,
    5908                 :             :                    "    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
    5909                 :             :         }
    5910                 :       60143 :       return false;
    5911                 :             :     }
    5912                 :     1119059 :   if ((ira_class_subset_p[cl][rclass] && cl != rclass)
    5913                 :             :       /* We don't use a subset of two classes because it can be
    5914                 :             :          NO_REGS.  This transformation is still profitable in most
    5915                 :             :          cases even if the classes are not intersected as register
    5916                 :             :          move is probably cheaper than a memory load.  */
    5917                 :      425814 :       || ira_class_hard_regs_num[cl] < ira_class_hard_regs_num[rclass])
    5918                 :             :     {
    5919                 :      693245 :       if (lra_dump_file != NULL)
    5920                 :           0 :         fprintf (lra_dump_file, "    Use smallest class of %s and %s\n",
    5921                 :             :                  reg_class_names[cl], reg_class_names[rclass]);
    5922                 :             : 
    5923                 :             :       rclass = cl;
    5924                 :             :     }
    5925                 :     1119059 :   if (check_secondary_memory_needed_p (rclass, next_usage_insns))
    5926                 :             :     {
    5927                 :             :       /* Reject inheritance resulting in secondary memory moves.
    5928                 :             :          Otherwise, there is a danger in LRA cycling.  Also such
    5929                 :             :          transformation will be unprofitable.  */
    5930                 :       14704 :       if (lra_dump_file != NULL)
    5931                 :             :         {
    5932                 :           0 :           rtx_insn *insn = skip_usage_debug_insns (next_usage_insns);
    5933                 :           0 :           rtx set = single_set (insn);
    5934                 :             : 
    5935                 :           0 :           lra_assert (set != NULL_RTX);
    5936                 :             : 
    5937                 :           0 :           rtx dest = SET_DEST (set);
    5938                 :             : 
    5939                 :           0 :           lra_assert (REG_P (dest));
    5940                 :           0 :           fprintf (lra_dump_file,
    5941                 :             :                    "    Rejecting inheritance for insn %d(%s)<-%d(%s) "
    5942                 :             :                    "as secondary mem is needed\n",
    5943                 :           0 :                    REGNO (dest), reg_class_names[get_reg_class (REGNO (dest))],
    5944                 :           0 :                    original_regno, reg_class_names[rclass]);
    5945                 :           0 :           fprintf (lra_dump_file,
    5946                 :             :                    "    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
    5947                 :             :         }
    5948                 :       14704 :       return false;
    5949                 :             :     }
    5950                 :     1104355 :   if (ira_reg_class_min_nregs[rclass][GET_MODE (original_reg)]
    5951                 :     1104355 :       != ira_reg_class_max_nregs[rclass][GET_MODE (original_reg)])
    5952                 :             :     {
    5953                 :          16 :       if (lra_dump_file != NULL)
    5954                 :             :         {
    5955                 :           0 :           fprintf (lra_dump_file,
    5956                 :             :                    "    Rejecting inheritance for %d "
    5957                 :             :                    "because of requiring non-uniform class %s\n",
    5958                 :             :                    original_regno, reg_class_names[rclass]);
    5959                 :           0 :           fprintf (lra_dump_file,
    5960                 :             :                    "    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
    5961                 :             :         }
    5962                 :          16 :       return false;
    5963                 :             :     }
    5964                 :     1104339 :   new_reg = lra_create_new_reg (GET_MODE (original_reg), original_reg,
    5965                 :             :                                 rclass, NULL, "inheritance");
    5966                 :     1104339 :   start_sequence ();
    5967                 :     1104339 :   if (def_p)
    5968                 :      517275 :     lra_emit_move (original_reg, new_reg);
    5969                 :             :   else
    5970                 :      587064 :     lra_emit_move (new_reg, original_reg);
    5971                 :     1104339 :   new_insns = get_insns ();
    5972                 :     1104339 :   end_sequence ();
    5973                 :     1104339 :   if (NEXT_INSN (new_insns) != NULL_RTX)
    5974                 :             :     {
    5975                 :           0 :       if (lra_dump_file != NULL)
    5976                 :             :         {
    5977                 :           0 :           fprintf (lra_dump_file,
    5978                 :             :                    "    Rejecting inheritance %d->%d "
    5979                 :             :                    "as it results in 2 or more insns:\n",
    5980                 :             :                    original_regno, REGNO (new_reg));
    5981                 :           0 :           dump_rtl_slim (lra_dump_file, new_insns, NULL, -1, 0);
    5982                 :           0 :           fprintf (lra_dump_file,
    5983                 :             :                    "       >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
    5984                 :             :         }
    5985                 :           0 :       return false;
    5986                 :             :     }
    5987                 :     1104339 :   lra_substitute_pseudo_within_insn (insn, original_regno, new_reg, false);
    5988                 :     1104339 :   lra_update_insn_regno_info (insn);
    5989                 :     1104339 :   if (! def_p)
    5990                 :             :     /* We now have a new usage insn for original regno.  */
    5991                 :      587064 :     setup_next_usage_insn (original_regno, new_insns, reloads_num, false);
    5992                 :     1104339 :   if (lra_dump_file != NULL)
    5993                 :           0 :     fprintf (lra_dump_file, "    Original reg change %d->%d (bb%d):\n",
    5994                 :           0 :              original_regno, REGNO (new_reg), BLOCK_FOR_INSN (insn)->index);
    5995                 :     1104339 :   lra_reg_info[REGNO (new_reg)].restore_rtx = regno_reg_rtx[original_regno];
    5996                 :     1104339 :   bitmap_set_bit (&check_only_regs, REGNO (new_reg));
    5997                 :     1104339 :   bitmap_set_bit (&check_only_regs, original_regno);
    5998                 :     1104339 :   bitmap_set_bit (&lra_inheritance_pseudos, REGNO (new_reg));
    5999                 :     1104339 :   if (def_p)
    6000                 :      517275 :     lra_process_new_insns (insn, NULL, new_insns,
    6001                 :             :                            "Add original<-inheritance");
    6002                 :             :   else
    6003                 :      587064 :     lra_process_new_insns (insn, new_insns, NULL,
    6004                 :             :                            "Add inheritance<-original");
    6005                 :     2459146 :   while (next_usage_insns != NULL_RTX)
    6006                 :             :     {
    6007                 :     1354807 :       if (GET_CODE (next_usage_insns) != INSN_LIST)
    6008                 :             :         {
    6009                 :     1104339 :           usage_insn = next_usage_insns;
    6010                 :     1104339 :           lra_assert (NONDEBUG_INSN_P (usage_insn));
    6011                 :             :           next_usage_insns = NULL;
    6012                 :             :         }
    6013                 :             :       else
    6014                 :             :         {
    6015                 :      250468 :           usage_insn = XEXP (next_usage_insns, 0);
    6016                 :      250468 :           lra_assert (DEBUG_INSN_P (usage_insn));
    6017                 :      250468 :           next_usage_insns = XEXP (next_usage_insns, 1);
    6018                 :             :         }
    6019                 :     1354807 :       lra_substitute_pseudo (&usage_insn, original_regno, new_reg, false,
    6020                 :     1354807 :                              DEBUG_INSN_P (usage_insn));
    6021                 :     1354807 :       lra_update_insn_regno_info (as_a <rtx_insn *> (usage_insn));
    6022                 :     1354807 :       if (lra_dump_file != NULL)
    6023                 :             :         {
    6024                 :           0 :           basic_block bb = BLOCK_FOR_INSN (usage_insn);
    6025                 :           0 :           fprintf (lra_dump_file,
    6026                 :             :                    "    Inheritance reuse change %d->%d (bb%d):\n",
    6027                 :             :                    original_regno, REGNO (new_reg),
    6028                 :             :                    bb ? bb->index : -1);
    6029                 :           0 :           dump_insn_slim (lra_dump_file, as_a <rtx_insn *> (usage_insn));
    6030                 :             :         }
    6031                 :             :     }
    6032                 :     1104339 :   if (lra_dump_file != NULL)
    6033                 :           0 :     fprintf (lra_dump_file,
    6034                 :             :              "       >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
    6035                 :             :   return true;
    6036                 :             : }
    6037                 :             : 
    6038                 :             : /* Return true if we need a caller save/restore for pseudo REGNO which
    6039                 :             :    was assigned to a hard register.  */
    6040                 :             : static inline bool
    6041                 :   105518835 : need_for_call_save_p (int regno)
    6042                 :             : {
    6043                 :   105518835 :   lra_assert (regno >= FIRST_PSEUDO_REGISTER && reg_renumber[regno] >= 0);
    6044                 :   105518835 :   if (usage_insns[regno].calls_num < calls_num)
    6045                 :             :     {
    6046                 :             :       unsigned int abis = 0;
    6047                 :    75752757 :       for (unsigned int i = 0; i < NUM_ABI_IDS; ++i)
    6048                 :    67335784 :         if (last_call_for_abi[i] > usage_insns[regno].calls_num)
    6049                 :     8416973 :           abis |= 1 << i;
    6050                 :     8416973 :       gcc_assert (abis);
    6051                 :     8416973 :       if (call_clobbered_in_region_p (abis, full_and_partial_call_clobbers,
    6052                 :     8416973 :                                       PSEUDO_REGNO_MODE (regno),
    6053                 :             :                                       reg_renumber[regno]))
    6054                 :             :         return true;
    6055                 :             :     }
    6056                 :             :   return false;
    6057                 :             : }
    6058                 :             : 
    6059                 :             : /* Global registers occurring in the current EBB.  */
    6060                 :             : static bitmap_head ebb_global_regs;
    6061                 :             : 
    6062                 :             : /* Return true if we need a split for hard register REGNO or pseudo
    6063                 :             :    REGNO which was assigned to a hard register.
    6064                 :             :    POTENTIAL_RELOAD_HARD_REGS contains hard registers which might be
    6065                 :             :    used for reloads since the EBB end.  It is an approximation of the
    6066                 :             :    used hard registers in the split range.  The exact value would
    6067                 :             :    require expensive calculations.  If we were aggressive with
    6068                 :             :    splitting because of the approximation, the split pseudo will save
    6069                 :             :    the same hard register assignment and will be removed in the undo
    6070                 :             :    pass.  We still need the approximation because too aggressive
    6071                 :             :    splitting would result in too inaccurate cost calculation in the
    6072                 :             :    assignment pass because of too many generated moves which will be
    6073                 :             :    probably removed in the undo pass.  */
    6074                 :             : static inline bool
    6075                 :   227113965 : need_for_split_p (HARD_REG_SET potential_reload_hard_regs, int regno)
    6076                 :             : {
    6077                 :   227113965 :   int hard_regno = regno < FIRST_PSEUDO_REGISTER ? regno : reg_renumber[regno];
    6078                 :             : 
    6079                 :   227113965 :   lra_assert (hard_regno >= 0);
    6080                 :   227113965 :   return ((TEST_HARD_REG_BIT (potential_reload_hard_regs, hard_regno)
    6081                 :             :            /* Don't split eliminable hard registers, otherwise we can
    6082                 :             :               split hard registers like hard frame pointer, which
    6083                 :             :               lives on BB start/end according to DF-infrastructure,
    6084                 :             :               when there is a pseudo assigned to the register and
    6085                 :             :               living in the same BB.  */
    6086                 :      636312 :            && (regno >= FIRST_PSEUDO_REGISTER
    6087                 :       41764 :                || ! TEST_HARD_REG_BIT (eliminable_regset, hard_regno))
    6088                 :      607526 :            && ! TEST_HARD_REG_BIT (lra_no_alloc_regs, hard_regno)
    6089                 :             :            /* Don't split call clobbered hard regs living through
    6090                 :             :               calls, otherwise we might have a check problem in the
    6091                 :             :               assign sub-pass as in the most cases (exception is a
    6092                 :             :               situation when check_and_force_assignment_correctness_p value is
    6093                 :             :               true) the assign pass assumes that all pseudos living
    6094                 :             :               through calls are assigned to call saved hard regs.  */
    6095                 :      595529 :            && (regno >= FIRST_PSEUDO_REGISTER
    6096                 :         981 :                || !TEST_HARD_REG_BIT (full_and_partial_call_clobbers, regno))
    6097                 :             :            /* We need at least 2 reloads to make pseudo splitting
    6098                 :             :               profitable.  We should provide hard regno splitting in
    6099                 :             :               any case to solve 1st insn scheduling problem when
    6100                 :             :               moving hard register definition up might result in
    6101                 :             :               impossibility to find hard register for reload pseudo of
    6102                 :             :               small register class.  */
    6103                 :     1190884 :            && (usage_insns[regno].reloads_num
    6104                 :     1189990 :                + (regno < FIRST_PSEUDO_REGISTER ? 0 : 3) < reloads_num)
    6105                 :        3185 :            && (regno < FIRST_PSEUDO_REGISTER
    6106                 :             :                /* For short living pseudos, spilling + inheritance can
    6107                 :             :                   be considered a substitution for splitting.
    6108                 :             :                   Therefore we do not splitting for local pseudos.  It
    6109                 :             :                   decreases also aggressiveness of splitting.  The
    6110                 :             :                   minimal number of references is chosen taking into
    6111                 :             :                   account that for 2 references splitting has no sense
    6112                 :             :                   as we can just spill the pseudo.  */
    6113                 :             :                || (regno >= FIRST_PSEUDO_REGISTER
    6114                 :        3133 :                    && lra_reg_info[regno].nrefs > 3
    6115                 :        2576 :                    && bitmap_bit_p (&ebb_global_regs, regno))))
    6116                 :   227748737 :           || (regno >= FIRST_PSEUDO_REGISTER && need_for_call_save_p (regno)));
    6117                 :             : }
    6118                 :             : 
    6119                 :             : /* Return class for the split pseudo created from original pseudo with
    6120                 :             :    ALLOCNO_CLASS and MODE which got a hard register HARD_REGNO.  We
    6121                 :             :    choose subclass of ALLOCNO_CLASS which contains HARD_REGNO and
    6122                 :             :    results in no secondary memory movements.  */
    6123                 :             : static enum reg_class
    6124                 :        1699 : choose_split_class (enum reg_class allocno_class,
    6125                 :             :                     int hard_regno ATTRIBUTE_UNUSED,
    6126                 :             :                     machine_mode mode ATTRIBUTE_UNUSED)
    6127                 :             : {
    6128                 :        1699 :   int i;
    6129                 :        1699 :   enum reg_class cl, best_cl = NO_REGS;
    6130                 :        1699 :   enum reg_class hard_reg_class ATTRIBUTE_UNUSED
    6131                 :             :     = REGNO_REG_CLASS (hard_regno);
    6132                 :             : 
    6133                 :        1699 :   if (! targetm.secondary_memory_needed (mode, allocno_class, allocno_class)
    6134                 :        1699 :       && TEST_HARD_REG_BIT (reg_class_contents[allocno_class], hard_regno))
    6135                 :             :     return allocno_class;
    6136                 :           0 :   for (i = 0;
    6137                 :           0 :        (cl = reg_class_subclasses[allocno_class][i]) != LIM_REG_CLASSES;
    6138                 :             :        i++)
    6139                 :           0 :     if (! targetm.secondary_memory_needed (mode, cl, hard_reg_class)
    6140                 :           0 :         && ! targetm.secondary_memory_needed (mode, hard_reg_class, cl)
    6141                 :           0 :         && TEST_HARD_REG_BIT (reg_class_contents[cl], hard_regno)
    6142                 :           0 :         && (best_cl == NO_REGS
    6143                 :           0 :             || ira_class_hard_regs_num[best_cl] < ira_class_hard_regs_num[cl]))
    6144                 :             :       best_cl = cl;
    6145                 :             :   return best_cl;
    6146                 :             : }
    6147                 :             : 
    6148                 :             : /* Copy any equivalence information from ORIGINAL_REGNO to NEW_REGNO.  It only
    6149                 :             :    makes sense to call this function if NEW_REGNO is always equal to
    6150                 :             :    ORIGINAL_REGNO.  Set up defined_p flag when caller_save_p flag is set up and
    6151                 :             :    CALL_SAVE_P is true.  */
    6152                 :             : 
    6153                 :             : static void
    6154                 :      557441 : lra_copy_reg_equiv (unsigned int new_regno, unsigned int original_regno,
    6155                 :             :                     bool call_save_p)
    6156                 :             : {
    6157                 :      557441 :   if (!ira_reg_equiv[original_regno].defined_p
    6158                 :      501120 :       && !(call_save_p && ira_reg_equiv[original_regno].caller_save_p))
    6159                 :             :     return;
    6160                 :             : 
    6161                 :       56480 :   ira_expand_reg_equiv ();
    6162                 :       56480 :   ira_reg_equiv[new_regno].defined_p = true;
    6163                 :       56480 :   if (ira_reg_equiv[original_regno].memory)
    6164                 :       28030 :     ira_reg_equiv[new_regno].memory
    6165                 :       28030 :       = copy_rtx (ira_reg_equiv[original_regno].memory);
    6166                 :       56480 :   if (ira_reg_equiv[original_regno].constant)
    6167                 :       23321 :     ira_reg_equiv[new_regno].constant
    6168                 :       23321 :       = copy_rtx (ira_reg_equiv[original_regno].constant);
    6169                 :       56480 :   if (ira_reg_equiv[original_regno].invariant)
    6170                 :        5129 :     ira_reg_equiv[new_regno].invariant
    6171                 :        5129 :       = copy_rtx (ira_reg_equiv[original_regno].invariant);
    6172                 :             : }
    6173                 :             : 
    6174                 :             : /* Do split transformations for insn INSN, which defines or uses
    6175                 :             :    ORIGINAL_REGNO.  NEXT_USAGE_INSNS specifies which instruction in
    6176                 :             :    the EBB next uses ORIGINAL_REGNO; it has the same form as the
    6177                 :             :    "insns" field of usage_insns.  If TO is not NULL, we don't use
    6178                 :             :    usage_insns, we put restore insns after TO insn.  It is a case when
    6179                 :             :    we call it from lra_split_hard_reg_for, outside the inheritance
    6180                 :             :    pass.
    6181                 :             : 
    6182                 :             :    The transformations look like:
    6183                 :             : 
    6184                 :             :      p <- ...                  p <- ...
    6185                 :             :      ...                  s <- p    (new insn -- save)
    6186                 :             :      ...             =>
    6187                 :             :      ...                  p <- s    (new insn -- restore)
    6188                 :             :      <- ... p ...      <- ... p ...
    6189                 :             :    or
    6190                 :             :      <- ... p ...      <- ... p ...
    6191                 :             :      ...                  s <- p    (new insn -- save)
    6192                 :             :      ...             =>
    6193                 :             :      ...                  p <- s    (new insn -- restore)
    6194                 :             :      <- ... p ...      <- ... p ...
    6195                 :             : 
    6196                 :             :    where p is an original pseudo got a hard register or a hard
    6197                 :             :    register and s is a new split pseudo.  The save is put before INSN
    6198                 :             :    if BEFORE_P is true.  Return true if we succeed in such
    6199                 :             :    transformation.  */
    6200                 :             : static bool
    6201                 :      558738 : split_reg (bool before_p, int original_regno, rtx_insn *insn,
    6202                 :             :            rtx next_usage_insns, rtx_insn *to)
    6203                 :             : {
    6204                 :      558738 :   enum reg_class rclass;
    6205                 :      558738 :   rtx original_reg;
    6206                 :      558738 :   int hard_regno, nregs;
    6207                 :      558738 :   rtx new_reg, usage_insn;
    6208                 :      558738 :   rtx_insn *restore, *save;
    6209                 :      558738 :   bool after_p;
    6210                 :      558738 :   bool call_save_p;
    6211                 :      558738 :   machine_mode mode;
    6212                 :             : 
    6213                 :      558738 :   if (original_regno < FIRST_PSEUDO_REGISTER)
    6214                 :             :     {
    6215                 :         212 :       rclass = ira_allocno_class_translate[REGNO_REG_CLASS (original_regno)];
    6216                 :         212 :       hard_regno = original_regno;
    6217                 :         212 :       call_save_p = false;
    6218                 :         212 :       nregs = 1;
    6219                 :         212 :       mode = lra_reg_info[hard_regno].biggest_mode;
    6220                 :         212 :       machine_mode reg_rtx_mode = GET_MODE (regno_reg_rtx[hard_regno]);
    6221                 :             :       /* A reg can have a biggest_mode of VOIDmode if it was only ever seen as
    6222                 :             :          part of a multi-word register.  In that case, just use the reg_rtx
    6223                 :             :          mode.  Do the same also if the biggest mode was larger than a register
    6224                 :             :          or we can not compare the modes.  Otherwise, limit the size to that of
    6225                 :             :          the biggest access in the function or to the natural mode at least.  */
    6226                 :         212 :       if (mode == VOIDmode
    6227                 :         212 :           || !ordered_p (GET_MODE_PRECISION (mode),
    6228                 :         212 :                          GET_MODE_PRECISION (reg_rtx_mode))
    6229                 :         212 :           || paradoxical_subreg_p (mode, reg_rtx_mode)
    6230                 :         423 :           || maybe_gt (GET_MODE_PRECISION (reg_rtx_mode), GET_MODE_PRECISION (mode)))
    6231                 :             :         {
    6232                 :      558738 :           original_reg = regno_reg_rtx[hard_regno];
    6233                 :      558738 :           mode = reg_rtx_mode;
    6234                 :             :         }
    6235                 :             :       else
    6236                 :         195 :         original_reg = gen_rtx_REG (mode, hard_regno);
    6237                 :             :     }
    6238                 :             :   else
    6239                 :             :     {
    6240                 :      558526 :       mode = PSEUDO_REGNO_MODE (original_regno);
    6241                 :      558526 :       hard_regno = reg_renumber[original_regno];
    6242                 :      558526 :       nregs = hard_regno_nregs (hard_regno, mode);
    6243                 :      558526 :       rclass = lra_get_allocno_class (original_regno);
    6244                 :      558526 :       original_reg = regno_reg_rtx[original_regno];
    6245                 :      558526 :       call_save_p = need_for_call_save_p (original_regno);
    6246                 :             :     }
    6247                 :      558738 :   lra_assert (hard_regno >= 0);
    6248                 :      558738 :   if (lra_dump_file != NULL)
    6249                 :           0 :     fprintf (lra_dump_file,
    6250                 :             :              "       ((((((((((((((((((((((((((((((((((((((((((((((((\n");
    6251                 :             : 
    6252                 :      558738 :   if (call_save_p)
    6253                 :             :     {
    6254                 :      557039 :       mode = HARD_REGNO_CALLER_SAVE_MODE (hard_regno,
    6255                 :             :                                           hard_regno_nregs (hard_regno, mode),
    6256                 :             :                                           mode);
    6257                 :      557039 :       new_reg = lra_create_new_reg (mode, NULL_RTX, NO_REGS, NULL, "save");
    6258                 :             :     }
    6259                 :             :   else
    6260                 :             :     {
    6261                 :        1699 :       rclass = choose_split_class (rclass, hard_regno, mode);
    6262                 :        1699 :       if (rclass == NO_REGS)
    6263                 :             :         {
    6264                 :           0 :           if (lra_dump_file != NULL)
    6265                 :             :             {
    6266                 :           0 :               fprintf (lra_dump_file,
    6267                 :             :                        "    Rejecting split of %d(%s): "
    6268                 :             :                        "no good reg class for %d(%s)\n",
    6269                 :             :                        original_regno,
    6270                 :           0 :                        reg_class_names[lra_get_allocno_class (original_regno)],
    6271                 :             :                        hard_regno,
    6272                 :           0 :                        reg_class_names[REGNO_REG_CLASS (hard_regno)]);
    6273                 :           0 :               fprintf
    6274                 :           0 :                 (lra_dump_file,
    6275                 :             :                  "    ))))))))))))))))))))))))))))))))))))))))))))))))\n");
    6276                 :             :             }
    6277                 :           0 :           return false;
    6278                 :             :         }
    6279                 :             :       /* Split_if_necessary can split hard registers used as part of a
    6280                 :             :          multi-register mode but splits each register individually.  The
    6281                 :             :          mode used for each independent register may not be supported
    6282                 :             :          so reject the split.  Splitting the wider mode should theoretically
    6283                 :             :          be possible but is not implemented.  */
    6284                 :        1699 :       if (!targetm.hard_regno_mode_ok (hard_regno, mode))
    6285                 :             :         {
    6286                 :           0 :           if (lra_dump_file != NULL)
    6287                 :             :             {
    6288                 :           0 :               fprintf (lra_dump_file,
    6289                 :             :                        "    Rejecting split of %d(%s): unsuitable mode %s\n",
    6290                 :             :                        original_regno,
    6291                 :           0 :                        reg_class_names[lra_get_allocno_class (original_regno)],
    6292                 :           0 :                        GET_MODE_NAME (mode));
    6293                 :           0 :               fprintf
    6294                 :           0 :                 (lra_dump_file,
    6295                 :             :                  "    ))))))))))))))))))))))))))))))))))))))))))))))))\n");
    6296                 :             :             }
    6297                 :           0 :           return false;
    6298                 :             :         }
    6299                 :        1699 :       new_reg = lra_create_new_reg (mode, original_reg, rclass, NULL, "split");
    6300                 :        1699 :       reg_renumber[REGNO (new_reg)] = hard_regno;
    6301                 :             :     }
    6302                 :      558738 :   int new_regno = REGNO (new_reg);
    6303                 :      558738 :   save = emit_spill_move (true, new_reg, original_reg);
    6304                 :      558738 :   if (NEXT_INSN (save) != NULL_RTX && !call_save_p)
    6305                 :             :     {
    6306                 :           0 :       if (lra_dump_file != NULL)
    6307                 :             :         {
    6308                 :           0 :           fprintf
    6309                 :           0 :             (lra_dump_file,
    6310                 :             :              "       Rejecting split %d->%d resulting in > 2 save insns:\n",
    6311                 :             :              original_regno, new_regno);
    6312                 :           0 :           dump_rtl_slim (lra_dump_file, save, NULL, -1, 0);
    6313                 :           0 :           fprintf (lra_dump_file,
    6314                 :             :                    "       ))))))))))))))))))))))))))))))))))))))))))))))))\n");
    6315                 :             :         }
    6316                 :           0 :       return false;
    6317                 :             :     }
    6318                 :      558738 :   restore = emit_spill_move (false, new_reg, original_reg);
    6319                 :      558738 :   if (NEXT_INSN (restore) != NULL_RTX && !call_save_p)
    6320                 :             :     {
    6321                 :           0 :       if (lra_dump_file != NULL)
    6322                 :             :         {
    6323                 :           0 :           fprintf (lra_dump_file,
    6324                 :             :                    "       Rejecting split %d->%d "
    6325                 :             :                    "resulting in > 2 restore insns:\n",
    6326                 :             :                    original_regno, new_regno);
    6327                 :           0 :           dump_rtl_slim (lra_dump_file, restore, NULL, -1, 0);
    6328                 :           0 :           fprintf (lra_dump_file,
    6329                 :             :                    "       ))))))))))))))))))))))))))))))))))))))))))))))))\n");
    6330                 :             :         }
    6331                 :           0 :       return false;
    6332                 :             :     }
    6333                 :             :   /* Transfer equivalence information to the spill register, so that
    6334                 :             :      if we fail to allocate the spill register, we have the option of
    6335                 :             :      rematerializing the original value instead of spilling to the stack.  */
    6336                 :      558738 :   if (!HARD_REGISTER_NUM_P (original_regno)
    6337                 :      558526 :       && mode == PSEUDO_REGNO_MODE (original_regno))
    6338                 :      557441 :     lra_copy_reg_equiv (new_regno, original_regno, call_save_p);
    6339                 :      558738 :   lra_reg_info[new_regno].restore_rtx = regno_reg_rtx[original_regno];
    6340                 :      558738 :   bitmap_set_bit (&lra_split_regs, new_regno);
    6341                 :      558738 :   if (to != NULL)
    6342                 :             :     {
    6343                 :         160 :       lra_assert (next_usage_insns == NULL);
    6344                 :         160 :       usage_insn = to;
    6345                 :         160 :       after_p = true;
    6346                 :             :     }
    6347                 :             :   else
    6348                 :             :     {
    6349                 :             :       /* We need check_only_regs only inside the inheritance pass.  */
    6350                 :      558578 :       bitmap_set_bit (&check_only_regs, new_regno);
    6351                 :      558578 :       bitmap_set_bit (&check_only_regs, original_regno);
    6352                 :      558578 :       after_p = usage_insns[original_regno].after_p;
    6353                 :      640256 :       for (;;)
    6354                 :             :         {
    6355                 :      640256 :           if (GET_CODE (next_usage_insns) != INSN_LIST)
    6356                 :             :             {
    6357                 :      558578 :               usage_insn = next_usage_insns;
    6358                 :      558578 :               break;
    6359                 :             :             }
    6360                 :       81678 :           usage_insn = XEXP (next_usage_insns, 0);
    6361                 :       81678 :           lra_assert (DEBUG_INSN_P (usage_insn));
    6362                 :       81678 :           next_usage_insns = XEXP (next_usage_insns, 1);
    6363                 :       81678 :           lra_substitute_pseudo (&usage_insn, original_regno, new_reg, false,
    6364                 :             :                                  true);
    6365                 :       81678 :           lra_update_insn_regno_info (as_a <rtx_insn *> (usage_insn));
    6366                 :       81678 :           if (lra_dump_file != NULL)
    6367                 :             :             {
    6368                 :           0 :               fprintf (lra_dump_file, "    Split reuse change %d->%d:\n",
    6369                 :             :                        original_regno, new_regno);
    6370                 :           0 :               dump_insn_slim (lra_dump_file, as_a <rtx_insn *> (usage_insn));
    6371                 :             :             }
    6372                 :             :         }
    6373                 :             :     }
    6374                 :      558738 :   lra_assert (NOTE_P (usage_insn) || NONDEBUG_INSN_P (usage_insn));
    6375                 :      558738 :   lra_assert (usage_insn != insn || (after_p && before_p));
    6376                 :      955757 :   lra_process_new_insns (as_a <rtx_insn *> (usage_insn),
    6377                 :             :                          after_p ? NULL : restore,
    6378                 :             :                          after_p ? restore : NULL,
    6379                 :             :                          call_save_p ? "Add reg<-save" : "Add reg<-split");
    6380                 :      558738 :   if (call_save_p
    6381                 :      557039 :       && first_call_insn != NULL
    6382                 :     1115777 :       && BLOCK_FOR_INSN (first_call_insn) != BLOCK_FOR_INSN (insn))
    6383                 :             :     /* PR116028: If original_regno is a pseudo that has been assigned a
    6384                 :             :        callee-saved hard register, then emit the spill insn before the call
    6385                 :             :        insn 'first_call_insn' instead of adjacent to 'insn'.  If 'insn'
    6386                 :             :        and 'first_call_insn' belong to the same EBB but to two separate
    6387                 :             :        BBs, and if 'insn' is present in the entry BB, then generating the
    6388                 :             :        spill insn in the entry BB can prevent shrink wrap from happening.
    6389                 :             :        This is because the spill insn references the stack pointer and
    6390                 :             :        hence the prolog gets generated in the entry BB itself.  It is
    6391                 :             :        also more efficient to generate the spill before
    6392                 :             :        'first_call_insn' as the spill now occurs only in the path
    6393                 :             :        containing the call.  */
    6394                 :       20292 :     lra_process_new_insns (first_call_insn, save, NULL, "Add save<-reg");
    6395                 :             :   else
    6396                 :     1078062 :     lra_process_new_insns (insn, before_p ? save : NULL,
    6397                 :             :                            before_p ? NULL : save,
    6398                 :             :                            call_save_p ? "Add save<-reg" : "Add split<-reg");
    6399                 :      558738 :   if (nregs > 1 || original_regno < FIRST_PSEUDO_REGISTER)
    6400                 :             :     /* If we are trying to split multi-register.  We should check
    6401                 :             :        conflicts on the next assignment sub-pass.  IRA can allocate on
    6402                 :             :        sub-register levels, LRA do this on pseudos level right now and
    6403                 :             :        this discrepancy may create allocation conflicts after
    6404                 :             :        splitting.
    6405                 :             : 
    6406                 :             :        If we are trying to split hard register we should also check conflicts
    6407                 :             :        as such splitting can create artificial conflict of the hard register
    6408                 :             :        with another pseudo because of simplified conflict calculation in
    6409                 :             :        LRA.  */
    6410                 :        8956 :     check_and_force_assignment_correctness_p = true;
    6411                 :      558738 :   if (lra_dump_file != NULL)
    6412                 :           0 :     fprintf (lra_dump_file,
    6413                 :             :              "       ))))))))))))))))))))))))))))))))))))))))))))))))\n");
    6414                 :             :   return true;
    6415                 :             : }
    6416                 :             : 
    6417                 :             : /* Split a hard reg for reload pseudo REGNO having RCLASS and living
    6418                 :             :    in the range [FROM, TO].  Return true if did a split.  Otherwise,
    6419                 :             :    return false.  */
    6420                 :             : bool
    6421                 :         244 : spill_hard_reg_in_range (int regno, enum reg_class rclass, rtx_insn *from, rtx_insn *to)
    6422                 :             : {
    6423                 :         244 :   int i, hard_regno;
    6424                 :         244 :   int rclass_size;
    6425                 :         244 :   rtx_insn *insn;
    6426                 :         244 :   unsigned int uid;
    6427                 :         244 :   bitmap_iterator bi;
    6428                 :         244 :   HARD_REG_SET ignore;
    6429                 :             : 
    6430                 :         244 :   lra_assert (from != NULL && to != NULL);
    6431                 :         244 :   ignore = lra_no_alloc_regs;
    6432                 :         718 :   EXECUTE_IF_SET_IN_BITMAP (&lra_reg_info[regno].insn_bitmap, 0, uid, bi)
    6433                 :             :     {
    6434                 :         474 :       lra_insn_recog_data_t id = lra_insn_recog_data[uid];
    6435                 :         474 :       struct lra_static_insn_data *static_id = id->insn_static_data;
    6436                 :         474 :       struct lra_insn_reg *reg;
    6437                 :             : 
    6438                 :        2354 :       for (reg = id->regs; reg != NULL; reg = reg->next)
    6439                 :        1880 :         if (reg->regno < FIRST_PSEUDO_REGISTER)
    6440                 :         205 :           SET_HARD_REG_BIT (ignore, reg->regno);
    6441                 :         804 :       for (reg = static_id->hard_regs; reg != NULL; reg = reg->next)
    6442                 :         330 :         SET_HARD_REG_BIT (ignore, reg->regno);
    6443                 :             :     }
    6444                 :         244 :   rclass_size = ira_class_hard_regs_num[rclass];
    6445                 :        1358 :   for (i = 0; i < rclass_size; i++)
    6446                 :             :     {
    6447                 :        1274 :       hard_regno = ira_class_hard_regs[rclass][i];
    6448                 :        1274 :       if (! TEST_HARD_REG_BIT (lra_reg_info[regno].conflict_hard_regs, hard_regno)
    6449                 :        1274 :           || TEST_HARD_REG_BIT (ignore, hard_regno))
    6450                 :        1108 :         continue;
    6451                 :         479 :       for (insn = from; insn != NEXT_INSN (to); insn = NEXT_INSN (insn))
    6452                 :             :         {
    6453                 :         319 :           struct lra_static_insn_data *static_id;
    6454                 :         319 :           struct lra_insn_reg *reg;
    6455                 :             : 
    6456                 :         319 :           if (!INSN_P (insn))
    6457                 :           0 :               continue;
    6458                 :         319 :           if (bitmap_bit_p (&lra_reg_info[hard_regno].insn_bitmap,
    6459                 :         319 :                             INSN_UID (insn)))
    6460                 :             :             break;
    6461                 :         313 :           static_id = lra_get_insn_recog_data (insn)->insn_static_data;
    6462                 :         367 :           for (reg = static_id->hard_regs; reg != NULL; reg = reg->next)
    6463                 :          54 :             if (reg->regno == hard_regno)
    6464                 :             :               break;
    6465                 :             :           if (reg != NULL)
    6466                 :             :             break;
    6467                 :             :         }
    6468                 :         166 :       if (insn != NEXT_INSN (to))
    6469                 :           6 :         continue;
    6470                 :         160 :       if (split_reg (true, hard_regno, from, NULL, to))
    6471                 :             :         return true;
    6472                 :             :     }
    6473                 :             :   return false;
    6474                 :             : }
    6475                 :             : 
    6476                 :             : /* Recognize that we need a split transformation for insn INSN, which
    6477                 :             :    defines or uses REGNO in its insn biggest MODE (we use it only if
    6478                 :             :    REGNO is a hard register).  POTENTIAL_RELOAD_HARD_REGS contains
    6479                 :             :    hard registers which might be used for reloads since the EBB end.
    6480                 :             :    Put the save before INSN if BEFORE_P is true.  MAX_UID is maximla
    6481                 :             :    uid before starting INSN processing.  Return true if we succeed in
    6482                 :             :    such transformation.  */
    6483                 :             : static bool
    6484                 :   188884407 : split_if_necessary (int regno, machine_mode mode,
    6485                 :             :                     HARD_REG_SET potential_reload_hard_regs,
    6486                 :             :                     bool before_p, rtx_insn *insn, int max_uid)
    6487                 :             : {
    6488                 :   188884407 :   bool res = false;
    6489                 :   188884407 :   int i, nregs = 1;
    6490                 :   188884407 :   rtx next_usage_insns;
    6491                 :             : 
    6492                 :   188884407 :   if (regno < FIRST_PSEUDO_REGISTER)
    6493                 :    88573079 :     nregs = hard_regno_nregs (regno, mode);
    6494                 :   378120634 :   for (i = 0; i < nregs; i++)
    6495                 :   189236227 :     if (usage_insns[regno + i].check == curr_usage_insns_check
    6496                 :   125423200 :         && (next_usage_insns = usage_insns[regno + i].insns) != NULL_RTX
    6497                 :             :         /* To avoid processing the register twice or more.  */
    6498                 :   125423200 :         && ((GET_CODE (next_usage_insns) != INSN_LIST
    6499                 :   121483773 :              && INSN_UID (next_usage_insns) < max_uid)
    6500                 :     3939427 :             || (GET_CODE (next_usage_insns) == INSN_LIST
    6501                 :     3939427 :                 && (INSN_UID (XEXP (next_usage_insns, 0)) < max_uid)))
    6502                 :   125423200 :         && need_for_split_p (potential_reload_hard_regs, regno + i)
    6503                 :   189494179 :         && split_reg (before_p, regno + i, insn, next_usage_insns, NULL))
    6504                 :             :       res = true;
    6505                 :   188884407 :   return res;
    6506                 :             : }
    6507                 :             : 
    6508                 :             : /* Return TRUE if rtx X is considered as an invariant for
    6509                 :             :    inheritance.  */
    6510                 :             : static bool
    6511                 :    11072660 : invariant_p (const_rtx x)
    6512                 :             : {
    6513                 :    11072660 :   machine_mode mode;
    6514                 :    11072660 :   const char *fmt;
    6515                 :    11072660 :   enum rtx_code code;
    6516                 :    11072660 :   int i, j;
    6517                 :             : 
    6518                 :    11072660 :   if (side_effects_p (x))
    6519                 :             :     return false;
    6520                 :             : 
    6521                 :    11064305 :   code = GET_CODE (x);
    6522                 :    11064305 :   mode = GET_MODE (x);
    6523                 :    11064305 :   if (code == SUBREG)
    6524                 :             :     {
    6525                 :      490147 :       x = SUBREG_REG (x);
    6526                 :      490147 :       code = GET_CODE (x);
    6527                 :      490147 :       mode = wider_subreg_mode (mode, GET_MODE (x));
    6528                 :             :     }
    6529                 :             : 
    6530                 :    11064305 :   if (MEM_P (x))
    6531                 :             :     return false;
    6532                 :             : 
    6533                 :     9405497 :   if (REG_P (x))
    6534                 :             :     {
    6535                 :     3347824 :       int i, nregs, regno = REGNO (x);
    6536                 :             : 
    6537                 :     3347824 :       if (regno >= FIRST_PSEUDO_REGISTER || regno == STACK_POINTER_REGNUM
    6538                 :      846011 :           || TEST_HARD_REG_BIT (eliminable_regset, regno)
    6539                 :     3366888 :           || GET_MODE_CLASS (GET_MODE (x)) == MODE_CC)
    6540                 :             :         return false;
    6541                 :           2 :       nregs = hard_regno_nregs (regno, mode);
    6542                 :           2 :       for (i = 0; i < nregs; i++)
    6543                 :           2 :         if (! fixed_regs[regno + i]
    6544                 :             :             /* A hard register may be clobbered in the current insn
    6545                 :             :                but we can ignore this case because if the hard
    6546                 :             :                register is used it should be set somewhere after the
    6547                 :             :                clobber.  */
    6548                 :           2 :             || bitmap_bit_p (&invalid_invariant_regs, regno + i))
    6549                 :           2 :           return false;
    6550                 :             :     }
    6551                 :     6057673 :   fmt = GET_RTX_FORMAT (code);
    6552                 :    10622729 :   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
    6553                 :             :     {
    6554                 :     8004621 :       if (fmt[i] == 'e')
    6555                 :             :         {
    6556                 :     5220847 :           if (! invariant_p (XEXP (x, i)))
    6557                 :             :             return false;
    6558                 :             :         }
    6559                 :     2783774 :       else if (fmt[i] == 'E')
    6560                 :             :         {
    6561                 :      630661 :           for (j = XVECLEN (x, i) - 1; j >= 0; j--)
    6562                 :      524836 :             if (! invariant_p (XVECEXP (x, i, j)))
    6563                 :             :               return false;
    6564                 :             :         }
    6565                 :             :     }
    6566                 :             :   return true;
    6567                 :             : }
    6568                 :             : 
    6569                 :             : /* We have 'dest_reg <- invariant'.  Let us try to make an invariant
    6570                 :             :    inheritance transformation (using dest_reg instead invariant in a
    6571                 :             :    subsequent insn).  */
    6572                 :             : static bool
    6573                 :      170390 : process_invariant_for_inheritance (rtx dst_reg, rtx invariant_rtx)
    6574                 :             : {
    6575                 :      170390 :   invariant_ptr_t invariant_ptr;
    6576                 :      170390 :   rtx_insn *insn, *new_insns;
    6577                 :      170390 :   rtx insn_set, insn_reg, new_reg;
    6578                 :      170390 :   int insn_regno;
    6579                 :      170390 :   bool succ_p = false;
    6580                 :      170390 :   int dst_regno = REGNO (dst_reg);
    6581                 :      170390 :   machine_mode dst_mode = GET_MODE (dst_reg);
    6582                 :      170390 :   enum reg_class cl = lra_get_allocno_class (dst_regno), insn_reg_cl;
    6583                 :             : 
    6584                 :      170390 :   invariant_ptr = insert_invariant (invariant_rtx);
    6585                 :      170390 :   if ((insn = invariant_ptr->insn) != NULL_RTX)
    6586                 :             :     {
    6587                 :             :       /* We have a subsequent insn using the invariant.  */
    6588                 :       25455 :       insn_set = single_set (insn);
    6589                 :       25455 :       lra_assert (insn_set != NULL);
    6590                 :       25455 :       insn_reg = SET_DEST (insn_set);
    6591                 :       25455 :       lra_assert (REG_P (insn_reg));
    6592                 :       25455 :       insn_regno = REGNO (insn_reg);
    6593                 :       25455 :       insn_reg_cl = lra_get_allocno_class (insn_regno);
    6594                 :             : 
    6595                 :       25455 :       if (dst_mode == GET_MODE (insn_reg)
    6596                 :             :           /* We should consider only result move reg insns which are
    6597                 :             :              cheap.  */
    6598                 :       25383 :           && targetm.register_move_cost (dst_mode, cl, insn_reg_cl) == 2
    6599                 :       50329 :           && targetm.register_move_cost (dst_mode, cl, cl) == 2)
    6600                 :             :         {
    6601                 :       24874 :           if (lra_dump_file != NULL)
    6602                 :           0 :             fprintf (lra_dump_file,
    6603                 :             :                      "    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[\n");
    6604                 :       24874 :           new_reg = lra_create_new_reg (dst_mode, dst_reg, cl, NULL,
    6605                 :             :                                         "invariant inheritance");
    6606                 :       24874 :           bitmap_set_bit (&lra_inheritance_pseudos, REGNO (new_reg));
    6607                 :       24874 :           bitmap_set_bit (&check_only_regs, REGNO (new_reg));
    6608                 :       24874 :           lra_reg_info[REGNO (new_reg)].restore_rtx = PATTERN (insn);
    6609                 :       24874 :           start_sequence ();
    6610                 :       24874 :           lra_emit_move (new_reg, dst_reg);
    6611                 :       24874 :           new_insns = get_insns ();
    6612                 :       24874 :           end_sequence ();
    6613                 :       24874 :           lra_process_new_insns (curr_insn, NULL, new_insns,
    6614                 :             :                                  "Add invariant inheritance<-original");
    6615                 :       24874 :           start_sequence ();
    6616                 :       24874 :           lra_emit_move (SET_DEST (insn_set), new_reg);
    6617                 :       24874 :           new_insns = get_insns ();
    6618                 :       24874 :           end_sequence ();
    6619                 :       24874 :           lra_process_new_insns (insn, NULL, new_insns,
    6620                 :             :                                  "Changing reload<-inheritance");
    6621                 :       24874 :           lra_set_insn_deleted (insn);
    6622                 :       24874 :           succ_p = true;
    6623                 :       24874 :           if (lra_dump_file != NULL)
    6624                 :             :             {
    6625                 :           0 :               fprintf (lra_dump_file,
    6626                 :             :                        "    Invariant inheritance reuse change %d (bb%d):\n",
    6627                 :           0 :                        REGNO (new_reg), BLOCK_FOR_INSN (insn)->index);
    6628                 :           0 :               dump_insn_slim (lra_dump_file, insn);
    6629                 :           0 :               fprintf (lra_dump_file,
    6630                 :             :                        "     ]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]\n");
    6631                 :             :             }
    6632                 :             :         }
    6633                 :             :     }
    6634                 :      170390 :   invariant_ptr->insn = curr_insn;
    6635                 :      170390 :   return succ_p;
    6636                 :             : }
    6637                 :             : 
    6638                 :             : /* Check only registers living at the current program point in the
    6639                 :             :    current EBB.  */
    6640                 :             : static bitmap_head live_regs;
    6641                 :             : 
    6642                 :             : /* Update live info in EBB given by its HEAD and TAIL insns after
    6643                 :             :    inheritance/split transformation.  The function removes dead moves
    6644                 :             :    too.  */
    6645                 :             : static void
    6646                 :      686532 : update_ebb_live_info (rtx_insn *head, rtx_insn *tail)
    6647                 :             : {
    6648                 :      686532 :   unsigned int j;
    6649                 :      686532 :   int i, regno;
    6650                 :      686532 :   bool live_p;
    6651                 :      686532 :   rtx_insn *prev_insn;
    6652                 :      686532 :   rtx set;
    6653                 :      686532 :   bool remove_p;
    6654                 :      686532 :   basic_block last_bb, prev_bb, curr_bb;
    6655                 :      686532 :   bitmap_iterator bi;
    6656                 :      686532 :   struct lra_insn_reg *reg;
    6657                 :      686532 :   edge e;
    6658                 :      686532 :   edge_iterator ei;
    6659                 :             : 
    6660                 :      686532 :   last_bb = BLOCK_FOR_INSN (tail);
    6661                 :      686532 :   prev_bb = NULL;
    6662                 :      686532 :   for (curr_insn = tail;
    6663                 :    33869279 :        curr_insn != PREV_INSN (head);
    6664                 :    33182747 :        curr_insn = prev_insn)
    6665                 :             :     {
    6666                 :    33182747 :       prev_insn = PREV_INSN (curr_insn);
    6667                 :             :       /* We need to process empty blocks too.  They contain
    6668                 :             :          NOTE_INSN_BASIC_BLOCK referring for the basic block.  */
    6669                 :    33182747 :       if (NOTE_P (curr_insn) && NOTE_KIND (curr_insn) != NOTE_INSN_BASIC_BLOCK)
    6670                 :     1344795 :         continue;
    6671                 :    31837952 :       curr_bb = BLOCK_FOR_INSN (curr_insn);
    6672                 :    31837952 :       if (curr_bb != prev_bb)
    6673                 :             :         {
    6674                 :     1387427 :           if (prev_bb != NULL)
    6675                 :             :             {
    6676                 :             :               /* Update df_get_live_in (prev_bb):  */
    6677                 :    54040067 :               EXECUTE_IF_SET_IN_BITMAP (&check_only_regs, 0, j, bi)
    6678                 :    53339172 :                 if (bitmap_bit_p (&live_regs, j))
    6679                 :     1492425 :                   bitmap_set_bit (df_get_live_in (prev_bb), j);
    6680                 :             :                 else
    6681                 :    51846747 :                   bitmap_clear_bit (df_get_live_in (prev_bb), j);
    6682                 :             :             }
    6683                 :     1387427 :           if (curr_bb != last_bb)
    6684                 :             :             {
    6685                 :             :               /* Update df_get_live_out (curr_bb):  */
    6686                 :    54040067 :               EXECUTE_IF_SET_IN_BITMAP (&check_only_regs, 0, j, bi)
    6687                 :             :                 {
    6688                 :    53339172 :                   live_p = bitmap_bit_p (&live_regs, j);
    6689                 :    53339172 :                   if (! live_p)
    6690                 :   155453934 :                     FOR_EACH_EDGE (e, ei, curr_bb->succs)
    6691                 :   103656676 :                       if (bitmap_bit_p (df_get_live_in (e->dest), j))
    6692                 :             :                         {
    6693                 :             :                           live_p = true;
    6694                 :             :                           break;
    6695                 :             :                         }
    6696                 :    51846747 :                   if (live_p)
    6697                 :     1541914 :                     bitmap_set_bit (df_get_live_out (curr_bb), j);
    6698                 :             :                   else
    6699                 :    51797258 :                     bitmap_clear_bit (df_get_live_out (curr_bb), j);
    6700                 :             :                 }
    6701                 :             :             }
    6702                 :     1387427 :           prev_bb = curr_bb;
    6703                 :     1387427 :           bitmap_and (&live_regs, &check_only_regs, df_get_live_out (curr_bb));
    6704                 :             :         }
    6705                 :    31837952 :       if (! NONDEBUG_INSN_P (curr_insn))
    6706                 :    10952874 :         continue;
    6707                 :    20885078 :       curr_id = lra_get_insn_recog_data (curr_insn);
    6708                 :    20885078 :       curr_static_id = curr_id->insn_static_data;
    6709                 :    20885078 :       remove_p = false;
    6710                 :    20885078 :       if ((set = single_set (curr_insn)) != NULL_RTX
    6711                 :    20225080 :           && REG_P (SET_DEST (set))
    6712                 :    16183063 :           && (regno = REGNO (SET_DEST (set))) >= FIRST_PSEUDO_REGISTER
    6713                 :    11989028 :           && SET_DEST (set) != pic_offset_table_rtx
    6714                 :    11981920 :           && bitmap_bit_p (&check_only_regs, regno)
    6715                 :    23834381 :           && ! bitmap_bit_p (&live_regs, regno))
    6716                 :             :         remove_p = true;
    6717                 :             :       /* See which defined values die here.  */
    6718                 :    57482074 :       for (reg = curr_id->regs; reg != NULL; reg = reg->next)
    6719                 :    36596996 :         if (reg->type == OP_OUT && ! reg->subreg_p)
    6720                 :    14435954 :           bitmap_clear_bit (&live_regs, reg->regno);
    6721                 :    24865252 :       for (reg = curr_static_id->hard_regs; reg != NULL; reg = reg->next)
    6722                 :     3980174 :         if (reg->type == OP_OUT && ! reg->subreg_p)
    6723                 :     3037362 :           bitmap_clear_bit (&live_regs, reg->regno);
    6724                 :    20885078 :       if (curr_id->arg_hard_regs != NULL)
    6725                 :             :         /* Make clobbered argument hard registers die.  */
    6726                 :     3224302 :         for (i = 0; (regno = curr_id->arg_hard_regs[i]) >= 0; i++)
    6727                 :     2330968 :           if (regno >= FIRST_PSEUDO_REGISTER)
    6728                 :      193644 :             bitmap_clear_bit (&live_regs, regno - FIRST_PSEUDO_REGISTER);
    6729                 :             :       /* Mark each used value as live.  */
    6730                 :    57482074 :       for (reg = curr_id->regs; reg != NULL; reg = reg->next)
    6731                 :    36596996 :         if (reg->type != OP_OUT
    6732                 :    36596996 :             && bitmap_bit_p (&check_only_regs, reg->regno))
    6733                 :     4150362 :           bitmap_set_bit (&live_regs, reg->regno);
    6734                 :    24865252 :       for (reg = curr_static_id->hard_regs; reg != NULL; reg = reg->next)
    6735                 :     3980174 :         if (reg->type != OP_OUT
    6736                 :     3980174 :             && bitmap_bit_p (&check_only_regs, reg->regno))
    6737                 :           0 :           bitmap_set_bit (&live_regs, reg->regno);
    6738                 :    20885078 :       if (curr_id->arg_hard_regs != NULL)
    6739                 :             :         /* Make used argument hard registers live.  */
    6740                 :     3224302 :         for (i = 0; (regno = curr_id->arg_hard_regs[i]) >= 0; i++)
    6741                 :     2330968 :           if (regno < FIRST_PSEUDO_REGISTER
    6742                 :     2330968 :               && bitmap_bit_p (&check_only_regs, regno))
    6743                 :           0 :             bitmap_set_bit (&live_regs, regno);
    6744                 :             :       /* It is quite important to remove dead move insns because it
    6745                 :             :          means removing dead store.  We don't need to process them for
    6746                 :             :          constraints.  */
    6747                 :    20885078 :       if (remove_p)
    6748                 :             :         {
    6749                 :      289337 :           if (lra_dump_file != NULL)
    6750                 :             :             {
    6751                 :           0 :               fprintf (lra_dump_file, "        Removing dead insn:\n ");
    6752                 :           0 :               dump_insn_slim (lra_dump_file, curr_insn);
    6753                 :             :             }
    6754                 :      289337 :           lra_set_insn_deleted (curr_insn);
    6755                 :             :         }
    6756                 :             :     }
    6757                 :      686532 : }
    6758                 :             : 
    6759                 :             : /* The structure describes info to do an inheritance for the current
    6760                 :             :    insn.  We need to collect such info first before doing the
    6761                 :             :    transformations because the transformations change the insn
    6762                 :             :    internal representation.  */
    6763                 :             : struct to_inherit
    6764                 :             : {
    6765                 :             :   /* Original regno.  */
    6766                 :             :   int regno;
    6767                 :             :   /* Subsequent insns which can inherit original reg value.  */
    6768                 :             :   rtx insns;
    6769                 :             : };
    6770                 :             : 
    6771                 :             : /* Array containing all info for doing inheritance from the current
    6772                 :             :    insn.  */
    6773                 :             : static struct to_inherit to_inherit[LRA_MAX_INSN_RELOADS];
    6774                 :             : 
    6775                 :             : /* Number elements in the previous array.  */
    6776                 :             : static int to_inherit_num;
    6777                 :             : 
    6778                 :             : /* Add inheritance info REGNO and INSNS. Their meaning is described in
    6779                 :             :    structure to_inherit.  */
    6780                 :             : static void
    6781                 :      315412 : add_to_inherit (int regno, rtx insns)
    6782                 :             : {
    6783                 :      315412 :   int i;
    6784                 :             : 
    6785                 :      315520 :   for (i = 0; i < to_inherit_num; i++)
    6786                 :         108 :     if (to_inherit[i].regno == regno)
    6787                 :             :       return;
    6788                 :      315412 :   lra_assert (to_inherit_num < LRA_MAX_INSN_RELOADS);
    6789                 :      315412 :   to_inherit[to_inherit_num].regno = regno;
    6790                 :      315412 :   to_inherit[to_inherit_num++].insns = insns;
    6791                 :             : }
    6792                 :             : 
    6793                 :             : /* Return the last non-debug insn in basic block BB, or the block begin
    6794                 :             :    note if none.  */
    6795                 :             : static rtx_insn *
    6796                 :    28502310 : get_last_insertion_point (basic_block bb)
    6797                 :             : {
    6798                 :    28502310 :   rtx_insn *insn;
    6799                 :             : 
    6800                 :    30472244 :   FOR_BB_INSNS_REVERSE (bb, insn)
    6801                 :    30472244 :     if (NONDEBUG_INSN_P (insn) || NOTE_INSN_BASIC_BLOCK_P (insn))
    6802                 :    28502310 :       return insn;
    6803                 :           0 :   gcc_unreachable ();
    6804                 :             : }
    6805                 :             : 
    6806                 :             : /* Set up RES by registers living on edges FROM except the edge (FROM,
    6807                 :             :    TO) or by registers set up in a jump insn in BB FROM.  */
    6808                 :             : static void
    6809                 :    10986151 : get_live_on_other_edges (basic_block from, basic_block to, bitmap res)
    6810                 :             : {
    6811                 :    10986151 :   rtx_insn *last;
    6812                 :    10986151 :   struct lra_insn_reg *reg;
    6813                 :    10986151 :   edge e;
    6814                 :    10986151 :   edge_iterator ei;
    6815                 :             : 
    6816                 :    10986151 :   lra_assert (to != NULL);
    6817                 :    10986151 :   bitmap_clear (res);
    6818                 :    32711250 :   FOR_EACH_EDGE (e, ei, from->succs)
    6819                 :    21725099 :     if (e->dest != to)
    6820                 :    10738948 :       bitmap_ior_into (res, df_get_live_in (e->dest));
    6821                 :    10986151 :   last = get_last_insertion_point (from);
    6822                 :    10986151 :   if (! JUMP_P (last))
    6823                 :     1882528 :     return;
    6824                 :     9103623 :   curr_id = lra_get_insn_recog_data (last);
    6825                 :    18207066 :   for (reg = curr_id->regs; reg != NULL; reg = reg->next)
    6826                 :     9103443 :     if (reg->type != OP_IN)
    6827                 :          74 :       bitmap_set_bit (res, reg->regno);
    6828                 :             : }
    6829                 :             : 
    6830                 :             : /* Used as a temporary results of some bitmap calculations.  */
    6831                 :             : static bitmap_head temp_bitmap;
    6832                 :             : 
    6833                 :             : /* We split for reloads of small class of hard regs.  The following
    6834                 :             :    defines how many hard regs the class should have to be qualified as
    6835                 :             :    small.  The code is mostly oriented to x86/x86-64 architecture
    6836                 :             :    where some insns need to use only specific register or pair of
    6837                 :             :    registers and these register can live in RTL explicitly, e.g. for
    6838                 :             :    parameter passing.  */
    6839                 :             : static const int max_small_class_regs_num = 2;
    6840                 :             : 
    6841                 :             : /* Do inheritance/split transformations in EBB starting with HEAD and
    6842                 :             :    finishing on TAIL.  We process EBB insns in the reverse order.
    6843                 :             :    Return true if we did any inheritance/split transformation in the
    6844                 :             :    EBB.
    6845                 :             : 
    6846                 :             :    We should avoid excessive splitting which results in worse code
    6847                 :             :    because of inaccurate cost calculations for spilling new split
    6848                 :             :    pseudos in such case.  To achieve this we do splitting only if
    6849                 :             :    register pressure is high in given basic block and there are reload
    6850                 :             :    pseudos requiring hard registers.  We could do more register
    6851                 :             :    pressure calculations at any given program point to avoid necessary
    6852                 :             :    splitting even more but it is to expensive and the current approach
    6853                 :             :    works well enough.  */
    6854                 :             : static bool
    6855                 :    12023188 : inherit_in_ebb (rtx_insn *head, rtx_insn *tail)
    6856                 :             : {
    6857                 :    12023188 :   int i, src_regno, dst_regno, nregs;
    6858                 :    12023188 :   bool change_p, succ_p, update_reloads_num_p;
    6859                 :    12023188 :   rtx_insn *prev_insn, *last_insn;
    6860                 :    12023188 :   rtx next_usage_insns, curr_set;
    6861                 :    12023188 :   enum reg_class cl;
    6862                 :    12023188 :   struct lra_insn_reg *reg;
    6863                 :    12023188 :   basic_block last_processed_bb, curr_bb = NULL;
    6864                 :    12023188 :   HARD_REG_SET potential_reload_hard_regs, live_hard_regs;
    6865                 :    12023188 :   bitmap to_process;
    6866                 :    12023188 :   unsigned int j;
    6867                 :    12023188 :   bitmap_iterator bi;
    6868                 :    12023188 :   bool head_p, after_p;
    6869                 :             : 
    6870                 :    12023188 :   change_p = false;
    6871                 :    12023188 :   curr_usage_insns_check++;
    6872                 :    12023188 :   clear_invariants ();
    6873                 :    12023188 :   reloads_num = calls_num = 0;
    6874                 :   108208692 :   for (unsigned int i = 0; i < NUM_ABI_IDS; ++i)
    6875                 :    96185504 :     last_call_for_abi[i] = 0;
    6876                 :    12023188 :   CLEAR_HARD_REG_SET (full_and_partial_call_clobbers);
    6877                 :    12023188 :   bitmap_clear (&check_only_regs);
    6878                 :    12023188 :   bitmap_clear (&invalid_invariant_regs);
    6879                 :    12023188 :   last_processed_bb = NULL;
    6880                 :    12023188 :   CLEAR_HARD_REG_SET (potential_reload_hard_regs);
    6881                 :    12023188 :   live_hard_regs = eliminable_regset | lra_no_alloc_regs;
    6882                 :             :   /* We don't process new insns generated in the loop.  */
    6883                 :   217713318 :   for (curr_insn = tail; curr_insn != PREV_INSN (head); curr_insn = prev_insn)
    6884                 :             :     {
    6885                 :   205690130 :       prev_insn = PREV_INSN (curr_insn);
    6886                 :   205690130 :       if (BLOCK_FOR_INSN (curr_insn) != NULL)
    6887                 :   205689921 :         curr_bb = BLOCK_FOR_INSN (curr_insn);
    6888                 :   205690130 :       if (last_processed_bb != curr_bb)
    6889                 :             :         {
    6890                 :             :           /* We are at the end of BB.  Add qualified living
    6891                 :             :              pseudos for potential splitting.  */
    6892                 :    17516159 :           to_process = df_get_live_out (curr_bb);
    6893                 :    17516159 :           if (last_processed_bb != NULL)
    6894                 :             :             {
    6895                 :             :               /* We are somewhere in the middle of EBB.  */
    6896                 :     5492971 :               get_live_on_other_edges (curr_bb, last_processed_bb,
    6897                 :             :                                        &temp_bitmap);
    6898                 :     5492971 :               to_process = &temp_bitmap;
    6899                 :             :             }
    6900                 :    17516159 :           last_processed_bb = curr_bb;
    6901                 :    17516159 :           last_insn = get_last_insertion_point (curr_bb);
    6902                 :    35032318 :           after_p = (! JUMP_P (last_insn)
    6903                 :    17516159 :                      && (! CALL_P (last_insn)
    6904                 :     2195151 :                          || (find_reg_note (last_insn,
    6905                 :             :                                            REG_NORETURN, NULL_RTX) == NULL_RTX
    6906                 :     1312184 :                              && ! SIBLING_CALL_P (last_insn))));
    6907                 :    17516159 :           CLEAR_HARD_REG_SET (potential_reload_hard_regs);
    6908                 :   186915181 :           EXECUTE_IF_SET_IN_BITMAP (to_process, 0, j, bi)
    6909                 :             :             {
    6910                 :   169399083 :               if ((int) j >= lra_constraint_new_regno_start)
    6911                 :             :                 break;
    6912                 :   169399022 :               if (j < FIRST_PSEUDO_REGISTER || reg_renumber[j] >= 0)
    6913                 :             :                 {
    6914                 :   110711061 :                   if (j < FIRST_PSEUDO_REGISTER)
    6915                 :    65992425 :                     SET_HARD_REG_BIT (live_hard_regs, j);
    6916                 :             :                   else
    6917                 :    44718636 :                     add_to_hard_reg_set (&live_hard_regs,
    6918                 :    44718636 :                                          PSEUDO_REGNO_MODE (j),
    6919                 :    44718636 :                                          reg_renumber[j]);
    6920                 :   110711061 :                   setup_next_usage_insn (j, last_insn, reloads_num, after_p);
    6921                 :             :                 }
    6922                 :             :             }
    6923                 :             :         }
    6924                 :   205690130 :       src_regno = dst_regno = -1;
    6925                 :   205690130 :       curr_set = single_set (curr_insn);
    6926                 :   205690130 :       if (curr_set != NULL_RTX && REG_P (SET_DEST (curr_set)))
    6927                 :    80343410 :         dst_regno = REGNO (SET_DEST (curr_set));
    6928                 :   108473345 :       if (curr_set != NULL_RTX && REG_P (SET_SRC (curr_set)))
    6929                 :    37514173 :         src_regno = REGNO (SET_SRC (curr_set));
    6930                 :   205690130 :       update_reloads_num_p = true;
    6931                 :   205690130 :       if (src_regno < lra_constraint_new_regno_start
    6932                 :   199593837 :           && src_regno >= FIRST_PSEUDO_REGISTER
    6933                 :    26344513 :           && reg_renumber[src_regno] < 0
    6934                 :     3606477 :           && dst_regno >= lra_constraint_new_regno_start
    6935                 :   208221771 :           && (cl = lra_get_allocno_class (dst_regno)) != NO_REGS)
    6936                 :             :         {
    6937                 :             :           /* 'reload_pseudo <- original_pseudo'.  */
    6938                 :     2531641 :           if (ira_class_hard_regs_num[cl] <= max_small_class_regs_num)
    6939                 :       23371 :             reloads_num++;
    6940                 :     2531641 :           update_reloads_num_p = false;
    6941                 :     2531641 :           succ_p = false;
    6942                 :     2531641 :           if (usage_insns[src_regno].check == curr_usage_insns_check
    6943                 :     2531641 :               && (next_usage_insns = usage_insns[src_regno].insns) != NULL_RTX)
    6944                 :      444791 :             succ_p = inherit_reload_reg (false, src_regno, cl,
    6945                 :             :                                          curr_insn, next_usage_insns);
    6946                 :      444791 :           if (succ_p)
    6947                 :             :             change_p = true;
    6948                 :             :           else
    6949                 :     2110257 :             setup_next_usage_insn (src_regno, curr_insn, reloads_num, false);
    6950                 :     5063282 :           if (hard_reg_set_subset_p (reg_class_contents[cl], live_hard_regs))
    6951                 :   577255382 :             potential_reload_hard_regs |= reg_class_contents[cl];
    6952                 :             :         }
    6953                 :   203158489 :       else if (src_regno < 0
    6954                 :   168175957 :                && dst_regno >= lra_constraint_new_regno_start
    6955                 :     5326977 :                && invariant_p (SET_SRC (curr_set))
    6956                 :      311990 :                && (cl = lra_get_allocno_class (dst_regno)) != NO_REGS
    6957                 :      311421 :                && ! bitmap_bit_p (&invalid_invariant_regs, dst_regno)
    6958                 :   203433691 :                && ! bitmap_bit_p (&invalid_invariant_regs,
    6959                 :      275202 :                                   ORIGINAL_REGNO(regno_reg_rtx[dst_regno])))
    6960                 :             :         {
    6961                 :             :           /* 'reload_pseudo <- invariant'.  */
    6962                 :      170390 :           if (ira_class_hard_regs_num[cl] <= max_small_class_regs_num)
    6963                 :       12882 :             reloads_num++;
    6964                 :      170390 :           update_reloads_num_p = false;
    6965                 :      170390 :           if (process_invariant_for_inheritance (SET_DEST (curr_set), SET_SRC (curr_set)))
    6966                 :       24874 :             change_p = true;
    6967                 :      340780 :           if (hard_reg_set_subset_p (reg_class_contents[cl], live_hard_regs))
    6968                 :   577255382 :             potential_reload_hard_regs |= reg_class_contents[cl];
    6969                 :             :         }
    6970                 :   202988099 :       else if (src_regno >= lra_constraint_new_regno_start
    6971                 :     6096293 :                && dst_regno < lra_constraint_new_regno_start
    6972                 :     5317085 :                && dst_regno >= FIRST_PSEUDO_REGISTER
    6973                 :     3633759 :                && reg_renumber[dst_regno] < 0
    6974                 :     1396896 :                && (cl = lra_get_allocno_class (src_regno)) != NO_REGS
    6975                 :     1396896 :                && usage_insns[dst_regno].check == curr_usage_insns_check
    6976                 :   202988099 :                && (next_usage_insns
    6977                 :      454008 :                    = usage_insns[dst_regno].insns) != NULL_RTX)
    6978                 :             :         {
    6979                 :      454008 :           if (ira_class_hard_regs_num[cl] <= max_small_class_regs_num)
    6980                 :        7334 :             reloads_num++;
    6981                 :      454008 :           update_reloads_num_p = false;
    6982                 :             :           /* 'original_pseudo <- reload_pseudo'.  */
    6983                 :      454008 :           if (! JUMP_P (curr_insn)
    6984                 :      454008 :               && inherit_reload_reg (true, dst_regno, cl,
    6985                 :             :                                      curr_insn, next_usage_insns))
    6986                 :             :             change_p = true;
    6987                 :             :           /* Invalidate.  */
    6988                 :      454008 :           usage_insns[dst_regno].check = 0;
    6989                 :      908016 :           if (hard_reg_set_subset_p (reg_class_contents[cl], live_hard_regs))
    6990                 :   577255382 :             potential_reload_hard_regs |= reg_class_contents[cl];
    6991                 :             :         }
    6992                 :   202534091 :       else if (INSN_P (curr_insn))
    6993                 :             :         {
    6994                 :   168961254 :           int iter;
    6995                 :   168961254 :           int max_uid = get_max_uid ();
    6996                 :             : 
    6997                 :   168961254 :           curr_id = lra_get_insn_recog_data (curr_insn);
    6998                 :   168961254 :           curr_static_id = curr_id->insn_static_data;
    6999                 :   168961254 :           to_inherit_num = 0;
    7000                 :             :           /* Process insn definitions.  */
    7001                 :   506883762 :           for (iter = 0; iter < 2; iter++)
    7002                 :   337922508 :             for (reg = iter == 0 ? curr_id->regs : curr_static_id->hard_regs;
    7003                 :   551881693 :                  reg != NULL;
    7004                 :   213959185 :                  reg = reg->next)
    7005                 :   213959185 :               if (reg->type != OP_IN
    7006                 :   213959185 :                   && (dst_regno = reg->regno) < lra_constraint_new_regno_start)
    7007                 :             :                 {
    7008                 :    44146978 :                   if (dst_regno >= FIRST_PSEUDO_REGISTER && reg->type == OP_OUT
    7009                 :    42057843 :                       && reg_renumber[dst_regno] < 0 && ! reg->subreg_p
    7010                 :     1741629 :                       && usage_insns[dst_regno].check == curr_usage_insns_check
    7011                 :    87404957 :                       && (next_usage_insns
    7012                 :      126339 :                           = usage_insns[dst_regno].insns) != NULL_RTX)
    7013                 :             :                     {
    7014                 :      126339 :                       struct lra_insn_reg *r;
    7015                 :             : 
    7016                 :      377401 :                       for (r = curr_id->regs; r != NULL; r = r->next)
    7017                 :      251062 :                         if (r->type != OP_OUT && r->regno == dst_regno)
    7018                 :             :                           break;
    7019                 :             :                       /* Don't do inheritance if the pseudo is also
    7020                 :             :                          used in the insn.  */
    7021                 :      126339 :                       if (r == NULL)
    7022                 :             :                         /* We cannot do inheritance right now
    7023                 :             :                            because the current insn reg info (chain
    7024                 :             :                            regs) can change after that.  */
    7025                 :      126339 :                         add_to_inherit (dst_regno, next_usage_insns);
    7026                 :             :                     }
    7027                 :             :                   /* We cannot process one reg twice here because of
    7028                 :             :                      usage_insns invalidation.  */
    7029                 :    87404957 :                   if ((dst_regno < FIRST_PSEUDO_REGISTER
    7030                 :    44146978 :                        || reg_renumber[dst_regno] >= 0)
    7031                 :    85520849 :                       && ! reg->subreg_p && reg->type != OP_IN)
    7032                 :             :                     {
    7033                 :    85231380 :                       HARD_REG_SET s;
    7034                 :             : 
    7035                 :    85231380 :                       if (split_if_necessary (dst_regno, reg->biggest_mode,
    7036                 :             :                                               potential_reload_hard_regs,
    7037                 :             :                                               false, curr_insn, max_uid))
    7038                 :       58507 :                         change_p = true;
    7039                 :    85231380 :                       CLEAR_HARD_REG_SET (s);
    7040                 :    85231380 :                       if (dst_regno < FIRST_PSEUDO_REGISTER)
    7041                 :    43257979 :                         add_to_hard_reg_set (&s, reg->biggest_mode, dst_regno);
    7042                 :             :                       else
    7043                 :    41973401 :                         add_to_hard_reg_set (&s, PSEUDO_REGNO_MODE (dst_regno),
    7044                 :    41973401 :                                              reg_renumber[dst_regno]);
    7045                 :    85231380 :                       live_hard_regs &= ~s;
    7046                 :   170462760 :                       potential_reload_hard_regs &= ~s;
    7047                 :             :                     }
    7048                 :             :                   /* We should invalidate potential inheritance or
    7049                 :             :                      splitting for the current insn usages to the next
    7050                 :             :                      usage insns (see code below) as the output pseudo
    7051                 :             :                      prevents this.  */
    7052                 :    87404957 :                   if ((dst_regno >= FIRST_PSEUDO_REGISTER
    7053                 :    44146978 :                        && reg_renumber[dst_regno] < 0)
    7054                 :    85520849 :                       || (reg->type == OP_OUT && ! reg->subreg_p
    7055                 :    77674188 :                           && (dst_regno < FIRST_PSEUDO_REGISTER
    7056                 :    39892916 :                               || reg_renumber[dst_regno] >= 0)))
    7057                 :             :                     {
    7058                 :             :                       /* Invalidate and mark definitions.  */
    7059                 :    41777024 :                       if (dst_regno >= FIRST_PSEUDO_REGISTER)
    7060                 :    41777024 :                         usage_insns[dst_regno].check = -(int) INSN_UID (curr_insn);
    7061                 :             :                       else
    7062                 :             :                         {
    7063                 :    37781272 :                           nregs = hard_regno_nregs (dst_regno,
    7064                 :    37781272 :                                                     reg->biggest_mode);
    7065                 :    75825764 :                           for (i = 0; i < nregs; i++)
    7066                 :    76088984 :                             usage_insns[dst_regno + i].check
    7067                 :    38044492 :                               = -(int) INSN_UID (curr_insn);
    7068                 :             :                         }
    7069                 :             :                     }
    7070                 :             :                 }
    7071                 :             :           /* Process clobbered call regs.  */
    7072                 :   168961254 :           if (curr_id->arg_hard_regs != NULL)
    7073                 :    19059010 :             for (i = 0; (dst_regno = curr_id->arg_hard_regs[i]) >= 0; i++)
    7074                 :    13634053 :               if (dst_regno >= FIRST_PSEUDO_REGISTER)
    7075                 :     1618074 :                 usage_insns[dst_regno - FIRST_PSEUDO_REGISTER].check
    7076                 :      809037 :                   = -(int) INSN_UID (curr_insn);
    7077                 :   168961254 :           if (! JUMP_P (curr_insn))
    7078                 :   158182466 :             for (i = 0; i < to_inherit_num; i++)
    7079                 :      126339 :               if (inherit_reload_reg (true, to_inherit[i].regno,
    7080                 :             :                                       ALL_REGS, curr_insn,
    7081                 :             :                                       to_inherit[i].insns))
    7082                 :       99323 :               change_p = true;
    7083                 :   168961254 :           if (CALL_P (curr_insn))
    7084                 :             :             {
    7085                 :     7003259 :               rtx cheap, pat, dest;
    7086                 :     7003259 :               rtx_insn *restore;
    7087                 :     7003259 :               int regno, hard_regno;
    7088                 :             : 
    7089                 :     7003259 :               calls_num++;
    7090                 :     7003259 :               function_abi callee_abi = insn_callee_abi (curr_insn);
    7091                 :     7003259 :               last_call_for_abi[callee_abi.id ()] = calls_num;
    7092                 :     7003259 :               full_and_partial_call_clobbers
    7093                 :     7003259 :                 |= callee_abi.full_and_partial_reg_clobbers ();
    7094                 :     7003259 :               first_call_insn = curr_insn;
    7095                 :     7003259 :               if ((cheap = find_reg_note (curr_insn,
    7096                 :             :                                           REG_RETURNED, NULL_RTX)) != NULL_RTX
    7097                 :       30642 :                   && ((cheap = XEXP (cheap, 0)), true)
    7098                 :       30642 :                   && (regno = REGNO (cheap)) >= FIRST_PSEUDO_REGISTER
    7099                 :       30642 :                   && (hard_regno = reg_renumber[regno]) >= 0
    7100                 :       25533 :                   && usage_insns[regno].check == curr_usage_insns_check
    7101                 :             :                   /* If there are pending saves/restores, the
    7102                 :             :                      optimization is not worth.  */
    7103                 :       21187 :                   && usage_insns[regno].calls_num == calls_num - 1
    7104                 :     7023213 :                   && callee_abi.clobbers_reg_p (GET_MODE (cheap), hard_regno))
    7105                 :             :                 {
    7106                 :             :                   /* Restore the pseudo from the call result as
    7107                 :             :                      REG_RETURNED note says that the pseudo value is
    7108                 :             :                      in the call result and the pseudo is an argument
    7109                 :             :                      of the call.  */
    7110                 :        8743 :                   pat = PATTERN (curr_insn);
    7111                 :        8743 :                   if (GET_CODE (pat) == PARALLEL)
    7112                 :           0 :                     pat = XVECEXP (pat, 0, 0);
    7113                 :        8743 :                   dest = SET_DEST (pat);
    7114                 :             :                   /* For multiple return values dest is PARALLEL.
    7115                 :             :                      Currently we handle only single return value case.  */
    7116                 :        8743 :                   if (REG_P (dest))
    7117                 :             :                     {
    7118                 :        8743 :                       start_sequence ();
    7119                 :        8743 :                       emit_move_insn (cheap, copy_rtx (dest));
    7120                 :        8743 :                       restore = get_insns ();
    7121                 :        8743 :                       end_sequence ();
    7122                 :        8743 :                       lra_process_new_insns (curr_insn, NULL, restore,
    7123                 :             :                                              "Inserting call parameter restore");
    7124                 :             :                       /* We don't need to save/restore of the pseudo from
    7125                 :             :                          this call.      */
    7126                 :        8743 :                       usage_insns[regno].calls_num = calls_num;
    7127                 :        8743 :                       remove_from_hard_reg_set
    7128                 :        8743 :                         (&full_and_partial_call_clobbers,
    7129                 :        8743 :                          GET_MODE (cheap), hard_regno);
    7130                 :        8743 :                       bitmap_set_bit (&check_only_regs, regno);
    7131                 :             :                     }
    7132                 :             :                 }
    7133                 :             :             }
    7134                 :   168961254 :           to_inherit_num = 0;
    7135                 :             :           /* Process insn usages.  */
    7136                 :   506883762 :           for (iter = 0; iter < 2; iter++)
    7137                 :   337922508 :             for (reg = iter == 0 ? curr_id->regs : curr_static_id->hard_regs;
    7138                 :   551881693 :                  reg != NULL;
    7139                 :   213959185 :                  reg = reg->next)
    7140                 :   213959185 :               if ((reg->type != OP_OUT
    7141                 :    86084383 :                    || (reg->type == OP_OUT && reg->subreg_p))
    7142                 :   214528364 :                   && (src_regno = reg->regno) < lra_constraint_new_regno_start)
    7143                 :             :                 {
    7144                 :   117411712 :                   if (src_regno >= FIRST_PSEUDO_REGISTER
    7145                 :    68086186 :                       && reg_renumber[src_regno] < 0 && reg->type == OP_IN)
    7146                 :             :                     {
    7147                 :     2383343 :                       if (usage_insns[src_regno].check == curr_usage_insns_check
    7148                 :      722931 :                           && (next_usage_insns
    7149                 :      722931 :                               = usage_insns[src_regno].insns) != NULL_RTX
    7150                 :     3106274 :                           && NONDEBUG_INSN_P (curr_insn))
    7151                 :      189073 :                         add_to_inherit (src_regno, next_usage_insns);
    7152                 :     4388540 :                       else if (usage_insns[src_regno].check
    7153                 :     2194270 :                                != -(int) INSN_UID (curr_insn))
    7154                 :             :                         /* Add usages but only if the reg is not set up
    7155                 :             :                            in the same insn.  */
    7156                 :     2194270 :                         add_next_usage_insn (src_regno, curr_insn, reloads_num);
    7157                 :             :                     }
    7158                 :    65702843 :                   else if (src_regno < FIRST_PSEUDO_REGISTER
    7159                 :    65702843 :                            || reg_renumber[src_regno] >= 0)
    7160                 :             :                     {
    7161                 :   114885890 :                       bool before_p;
    7162                 :   114885890 :                       rtx_insn *use_insn = curr_insn;
    7163                 :   114885890 :                       rtx_insn *prev_insn = PREV_INSN (curr_insn);
    7164                 :             : 
    7165                 :   229771780 :                       before_p = (JUMP_P (curr_insn)
    7166                 :   114885890 :                                   || (CALL_P (curr_insn) && reg->type == OP_IN));
    7167                 :   114885890 :                       if (NONDEBUG_INSN_P (curr_insn)
    7168                 :   103653131 :                           && (! JUMP_P (curr_insn) || reg->type == OP_IN)
    7169                 :   218538917 :                           && split_if_necessary (src_regno, reg->biggest_mode,
    7170                 :             :                                                  potential_reload_hard_regs,
    7171                 :             :                                                  before_p, curr_insn, max_uid))
    7172                 :             :                         {
    7173                 :      199445 :                           if (reg->subreg_p)
    7174                 :        2972 :                             check_and_force_assignment_correctness_p = true;
    7175                 :      199445 :                           change_p = true;
    7176                 :             :                           /* Invalidate. */
    7177                 :      199445 :                           usage_insns[src_regno].check = 0;
    7178                 :      199445 :                           if (before_p && PREV_INSN (curr_insn) != prev_insn)
    7179                 :             :                             use_insn = PREV_INSN (curr_insn);
    7180                 :             :                         }
    7181                 :   114885890 :                       if (NONDEBUG_INSN_P (curr_insn))
    7182                 :             :                         {
    7183                 :   103653131 :                           if (src_regno < FIRST_PSEUDO_REGISTER)
    7184                 :    45315122 :                             add_to_hard_reg_set (&live_hard_regs,
    7185                 :    45315122 :                                                  reg->biggest_mode, src_regno);
    7186                 :             :                           else
    7187                 :    58338009 :                             add_to_hard_reg_set (&live_hard_regs,
    7188                 :    58338009 :                                                  PSEUDO_REGNO_MODE (src_regno),
    7189                 :    58338009 :                                                  reg_renumber[src_regno]);
    7190                 :             :                         }
    7191                 :   114885890 :                       if (src_regno >= FIRST_PSEUDO_REGISTER)
    7192                 :    65560364 :                         add_next_usage_insn (src_regno, use_insn, reloads_num);
    7193                 :             :                       else
    7194                 :             :                         {
    7195                 :    98740448 :                           for (i = 0; i < hard_regno_nregs (src_regno, reg->biggest_mode); i++)
    7196                 :    49414922 :                             add_next_usage_insn (src_regno + i, use_insn, reloads_num);
    7197                 :             :                         }
    7198                 :             :                     }
    7199                 :             :                 }
    7200                 :             :           /* Process used call regs.  */
    7201                 :   168961254 :           if (curr_id->arg_hard_regs != NULL)
    7202                 :    19059010 :             for (i = 0; (src_regno = curr_id->arg_hard_regs[i]) >= 0; i++)
    7203                 :    13634053 :               if (src_regno < FIRST_PSEUDO_REGISTER)
    7204                 :             :                 {
    7205                 :    12825016 :                    SET_HARD_REG_BIT (live_hard_regs, src_regno);
    7206                 :    12825016 :                    add_next_usage_insn (src_regno, curr_insn, reloads_num);
    7207                 :             :                 }
    7208                 :   169150327 :           for (i = 0; i < to_inherit_num; i++)
    7209                 :             :             {
    7210                 :      189073 :               src_regno = to_inherit[i].regno;
    7211                 :      189073 :               if (inherit_reload_reg (false, src_regno, ALL_REGS,
    7212                 :             :                                       curr_insn, to_inherit[i].insns))
    7213                 :             :                 change_p = true;
    7214                 :             :               else
    7215                 :       23393 :                 setup_next_usage_insn (src_regno, curr_insn, reloads_num, false);
    7216                 :             :             }
    7217                 :             :         }
    7218                 :   169031161 :       if (update_reloads_num_p
    7219                 :   202534091 :           && NONDEBUG_INSN_P (curr_insn) && curr_set != NULL_RTX)
    7220                 :             :         {
    7221                 :   105317306 :           int regno = -1;
    7222                 :   105317306 :           if ((REG_P (SET_DEST (curr_set))
    7223                 :    77187371 :                && (regno = REGNO (SET_DEST (curr_set))) >= lra_constraint_new_regno_start
    7224                 :     7847170 :                && reg_renumber[regno] < 0
    7225                 :     5012090 :                && (cl = lra_get_allocno_class (regno)) != NO_REGS)
    7226                 :   177740708 :               || (REG_P (SET_SRC (curr_set))
    7227                 :    33305055 :                   && (regno = REGNO (SET_SRC (curr_set))) >= lra_constraint_new_regno_start
    7228                 :     5719904 :                   && reg_renumber[regno] < 0
    7229                 :     3351211 :                   && (cl = lra_get_allocno_class (regno)) != NO_REGS))
    7230                 :             :             {
    7231                 :     7878514 :               if (ira_class_hard_regs_num[cl] <= max_small_class_regs_num)
    7232                 :      248485 :                 reloads_num++;
    7233                 :    15757028 :               if (hard_reg_set_subset_p (reg_class_contents[cl], live_hard_regs))
    7234                 :   205690130 :                 potential_reload_hard_regs |= reg_class_contents[cl];
    7235                 :             :             }
    7236                 :             :         }
    7237                 :   205690130 :       if (NONDEBUG_INSN_P (curr_insn))
    7238                 :             :         {
    7239                 :   114615237 :           int regno;
    7240                 :             : 
    7241                 :             :           /* Invalidate invariants with changed regs.  */
    7242                 :   114615237 :           curr_id = lra_get_insn_recog_data (curr_insn);
    7243                 :   292426735 :           for (reg = curr_id->regs; reg != NULL; reg = reg->next)
    7244                 :   177811498 :             if (reg->type != OP_IN)
    7245                 :             :               {
    7246                 :    77493571 :                 bitmap_set_bit (&invalid_invariant_regs, reg->regno);
    7247                 :   154987142 :                 bitmap_set_bit (&invalid_invariant_regs,
    7248                 :    77493571 :                                 ORIGINAL_REGNO (regno_reg_rtx[reg->regno]));
    7249                 :             :               }
    7250                 :   114615237 :           curr_static_id = curr_id->insn_static_data;
    7251                 :   144512243 :           for (reg = curr_static_id->hard_regs; reg != NULL; reg = reg->next)
    7252                 :    29897006 :             if (reg->type != OP_IN)
    7253                 :    21510583 :               bitmap_set_bit (&invalid_invariant_regs, reg->regno);
    7254                 :   114615237 :           if (curr_id->arg_hard_regs != NULL)
    7255                 :    19059010 :             for (i = 0; (regno = curr_id->arg_hard_regs[i]) >= 0; i++)
    7256                 :    13634053 :               if (regno >= FIRST_PSEUDO_REGISTER)
    7257                 :      809037 :                 bitmap_set_bit (&invalid_invariant_regs,
    7258                 :             :                                 regno - FIRST_PSEUDO_REGISTER);
    7259                 :             :         }
    7260                 :             :       /* We reached the start of the current basic block.  */
    7261                 :   205690128 :       if (prev_insn == NULL_RTX || prev_insn == PREV_INSN (head)
    7262                 :   399357072 :           || BLOCK_FOR_INSN (prev_insn) != curr_bb)
    7263                 :             :         {
    7264                 :             :           /* We reached the beginning of the current block -- do
    7265                 :             :              rest of spliting in the current BB.  */
    7266                 :    17516368 :           to_process = df_get_live_in (curr_bb);
    7267                 :    17516368 :           if (BLOCK_FOR_INSN (head) != curr_bb)
    7268                 :             :             {
    7269                 :             :               /* We are somewhere in the middle of EBB.  */
    7270                 :     5493180 :               get_live_on_other_edges (EDGE_PRED (curr_bb, 0)->src,
    7271                 :             :                                        curr_bb, &temp_bitmap);
    7272                 :     5493180 :               to_process = &temp_bitmap;
    7273                 :             :             }
    7274                 :    17516368 :           head_p = true;
    7275                 :   180580082 :           EXECUTE_IF_SET_IN_BITMAP (to_process, 0, j, bi)
    7276                 :             :             {
    7277                 :   163063773 :               if ((int) j >= lra_constraint_new_regno_start)
    7278                 :             :                 break;
    7279                 :   102199504 :               if (((int) j < FIRST_PSEUDO_REGISTER || reg_renumber[j] >= 0)
    7280                 :   103420697 :                   && usage_insns[j].check == curr_usage_insns_check
    7281                 :   264754479 :                   && (next_usage_insns = usage_insns[j].insns) != NULL_RTX)
    7282                 :             :                 {
    7283                 :   101690765 :                   if (need_for_split_p (potential_reload_hard_regs, j))
    7284                 :             :                     {
    7285                 :      300626 :                       if (lra_dump_file != NULL && head_p)
    7286                 :             :                         {
    7287                 :           0 :                           fprintf (lra_dump_file,
    7288                 :             :                                    "  ----------------------------------\n");
    7289                 :           0 :                           head_p = false;
    7290                 :             :                         }
    7291                 :      300626 :                       if (split_reg (false, j, bb_note (curr_bb),
    7292                 :             :                                      next_usage_insns, NULL))
    7293                 :      300626 :                         change_p = true;
    7294                 :             :                     }
    7295                 :   101690765 :                   usage_insns[j].check = 0;
    7296                 :             :                 }
    7297                 :             :             }
    7298                 :             :         }
    7299                 :             :     }
    7300                 :    12023188 :   first_call_insn = NULL;
    7301                 :    12023188 :   return change_p;
    7302                 :             : }
    7303                 :             : 
    7304                 :             : /* This value affects EBB forming.  If probability of edge from EBB to
    7305                 :             :    a BB is not greater than the following value, we don't add the BB
    7306                 :             :    to EBB.  */
    7307                 :             : #define EBB_PROBABILITY_CUTOFF \
    7308                 :             :   ((REG_BR_PROB_BASE * param_lra_inheritance_ebb_probability_cutoff) / 100)
    7309                 :             : 
    7310                 :             : /* Current number of inheritance/split iteration.  */
    7311                 :             : int lra_inheritance_iter;
    7312                 :             : 
    7313                 :             : /* Entry function for inheritance/split pass.  */
    7314                 :             : void
    7315                 :     1498730 : lra_inheritance (void)
    7316                 :             : {
    7317                 :     1498730 :   int i;
    7318                 :     1498730 :   basic_block bb, start_bb;
    7319                 :     1498730 :   edge e;
    7320                 :             : 
    7321                 :     1498730 :   lra_inheritance_iter++;
    7322                 :     1498730 :   if (lra_inheritance_iter > LRA_MAX_INHERITANCE_PASSES)
    7323                 :             :     return;
    7324                 :     1496066 :   timevar_push (TV_LRA_INHERITANCE);
    7325                 :     1496066 :   if (lra_dump_file != NULL)
    7326                 :          97 :     fprintf (lra_dump_file, "\n********** Inheritance #%d: **********\n\n",
    7327                 :             :              lra_inheritance_iter);
    7328                 :     1496066 :   curr_usage_insns_check = 0;
    7329                 :     1496066 :   usage_insns = XNEWVEC (struct usage_insns, lra_constraint_new_regno_start);
    7330                 :   221011629 :   for (i = 0; i < lra_constraint_new_regno_start; i++)
    7331                 :   219515563 :     usage_insns[i].check = 0;
    7332                 :     1496066 :   bitmap_initialize (&check_only_regs, &reg_obstack);
    7333                 :     1496066 :   bitmap_initialize (&invalid_invariant_regs, &reg_obstack);
    7334                 :     1496066 :   bitmap_initialize (&live_regs, &reg_obstack);
    7335                 :     1496066 :   bitmap_initialize (&temp_bitmap, &reg_obstack);
    7336                 :     1496066 :   bitmap_initialize (&ebb_global_regs, &reg_obstack);
    7337                 :    13519254 :   FOR_EACH_BB_FN (bb, cfun)
    7338                 :             :     {
    7339                 :    12023188 :       start_bb = bb;
    7340                 :    12023188 :       if (lra_dump_file != NULL)
    7341                 :         347 :         fprintf (lra_dump_file, "EBB");
    7342                 :             :       /* Form a EBB starting with BB.  */
    7343                 :    12023188 :       bitmap_clear (&ebb_global_regs);
    7344                 :    12023188 :       bitmap_ior_into (&ebb_global_regs, df_get_live_in (bb));
    7345                 :    17516159 :       for (;;)
    7346                 :             :         {
    7347                 :    17516159 :           if (lra_dump_file != NULL)
    7348                 :         487 :             fprintf (lra_dump_file, " %d", bb->index);
    7349                 :    17516159 :           if (bb->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun)
    7350                 :    16020093 :               || LABEL_P (BB_HEAD (bb->next_bb)))
    7351                 :             :             break;
    7352                 :     7730919 :           e = find_fallthru_edge (bb->succs);
    7353                 :     7730919 :           if (! e)
    7354                 :             :             break;
    7355                 :     7730919 :           if (e->probability.initialized_p ()
    7356                 :     7730919 :               && e->probability.to_reg_br_prob_base () < EBB_PROBABILITY_CUTOFF)
    7357                 :             :             break;
    7358                 :             :           bb = bb->next_bb;
    7359                 :             :         }
    7360                 :    12023188 :       bitmap_ior_into (&ebb_global_regs, df_get_live_out (bb));
    7361                 :    12023188 :       if (lra_dump_file != NULL)
    7362                 :         347 :         fprintf (lra_dump_file, "\n");
    7363                 :    12023188 :       if (inherit_in_ebb (BB_HEAD (start_bb), BB_END (bb)))
    7364                 :             :         /* Remember that the EBB head and tail can change in
    7365                 :             :            inherit_in_ebb.  */
    7366                 :      686532 :         update_ebb_live_info (BB_HEAD (start_bb), BB_END (bb));
    7367                 :             :     }
    7368                 :     1496066 :   bitmap_release (&ebb_global_regs);
    7369                 :     1496066 :   bitmap_release (&temp_bitmap);
    7370                 :     1496066 :   bitmap_release (&live_regs);
    7371                 :     1496066 :   bitmap_release (&invalid_invariant_regs);
    7372                 :     1496066 :   bitmap_release (&check_only_regs);
    7373                 :     1496066 :   free (usage_insns);
    7374                 :     1496066 :   lra_dump_insns_if_possible ("func after inheritance");
    7375                 :     1496066 :   timevar_pop (TV_LRA_INHERITANCE);
    7376                 :             : }
    7377                 :             : 
    7378                 :             : 
    7379                 :             : 
    7380                 :             : /* This page contains code to undo failed inheritance/split
    7381                 :             :    transformations.  */
    7382                 :             : 
    7383                 :             : /* Current number of iteration undoing inheritance/split.  */
    7384                 :             : int lra_undo_inheritance_iter;
    7385                 :             : 
    7386                 :             : /* Fix BB live info LIVE after removing pseudos created on pass doing
    7387                 :             :    inheritance/split which are REMOVED_PSEUDOS.  */
    7388                 :             : static void
    7389                 :    35032318 : fix_bb_live_info (bitmap live, bitmap removed_pseudos)
    7390                 :             : {
    7391                 :    35032318 :   unsigned int regno;
    7392                 :    35032318 :   bitmap_iterator bi;
    7393                 :             : 
    7394                 :   245813498 :   EXECUTE_IF_SET_IN_BITMAP (removed_pseudos, 0, regno, bi)
    7395                 :   210781180 :     if (bitmap_clear_bit (live, regno)
    7396                 :   210781180 :         && REG_P (lra_reg_info[regno].restore_rtx))
    7397                 :     1197524 :       bitmap_set_bit (live, REGNO (lra_reg_info[regno].restore_rtx));
    7398                 :    35032318 : }
    7399                 :             : 
    7400                 :             : /* Return regno of the (subreg of) REG. Otherwise, return a negative
    7401                 :             :    number.  */
    7402                 :             : static int
    7403                 :    64401628 : get_regno (rtx reg)
    7404                 :             : {
    7405                 :     1091292 :   if (GET_CODE (reg) == SUBREG)
    7406                 :     1107247 :     reg = SUBREG_REG (reg);
    7407                 :    64401628 :   if (REG_P (reg))
    7408                 :    41810354 :     return REGNO (reg);
    7409                 :             :   return -1;
    7410                 :             : }
    7411                 :             : 
    7412                 :             : /* Delete a move INSN with destination reg DREGNO and a previous
    7413                 :             :    clobber insn with the same regno.  The inheritance/split code can
    7414                 :             :    generate moves with preceding clobber and when we delete such moves
    7415                 :             :    we should delete the clobber insn too to keep the correct life
    7416                 :             :    info.  */
    7417                 :             : static void
    7418                 :      739550 : delete_move_and_clobber (rtx_insn *insn, int dregno)
    7419                 :             : {
    7420                 :      739550 :   rtx_insn *prev_insn = PREV_INSN (insn);
    7421                 :             : 
    7422                 :      739550 :   lra_set_insn_deleted (insn);
    7423                 :      739550 :   lra_assert (dregno >= 0);
    7424                 :      739550 :   if (prev_insn != NULL && NONDEBUG_INSN_P (prev_insn)
    7425                 :      313771 :       && GET_CODE (PATTERN (prev_insn)) == CLOBBER
    7426                 :      739944 :       && dregno == get_regno (XEXP (PATTERN (prev_insn), 0)))
    7427                 :           0 :     lra_set_insn_deleted (prev_insn);
    7428                 :      739550 : }
    7429                 :             : 
    7430                 :             : /* Remove inheritance/split pseudos which are in REMOVE_PSEUDOS and
    7431                 :             :    return true if we did any change.  The undo transformations for
    7432                 :             :    inheritance looks like
    7433                 :             :       i <- i2
    7434                 :             :       p <- i   =>   p <- i2
    7435                 :             :    or removing
    7436                 :             :       p <- i, i <- p, and i <- i3
    7437                 :             :    where p is original pseudo from which inheritance pseudo i was
    7438                 :             :    created, i and i3 are removed inheritance pseudos, i2 is another
    7439                 :             :    not removed inheritance pseudo.  All split pseudos or other
    7440                 :             :    occurrences of removed inheritance pseudos are changed on the
    7441                 :             :    corresponding original pseudos.
    7442                 :             : 
    7443                 :             :    The function also schedules insns changed and created during
    7444                 :             :    inheritance/split pass for processing by the subsequent constraint
    7445                 :             :    pass.  */
    7446                 :             : static bool
    7447                 :     1496066 : remove_inheritance_pseudos (bitmap remove_pseudos)
    7448                 :             : {
    7449                 :     1496066 :   basic_block bb;
    7450                 :     1496066 :   int regno, sregno, prev_sregno, dregno;
    7451                 :     1496066 :   rtx restore_rtx;
    7452                 :     1496066 :   rtx set, prev_set;
    7453                 :     1496066 :   rtx_insn *prev_insn;
    7454                 :     1496066 :   bool change_p, done_p;
    7455                 :             : 
    7456                 :     1496066 :   change_p = ! bitmap_empty_p (remove_pseudos);
    7457                 :             :   /* We cannot finish the function right away if CHANGE_P is true
    7458                 :             :      because we need to marks insns affected by previous
    7459                 :             :      inheritance/split pass for processing by the subsequent
    7460                 :             :      constraint pass.  */
    7461                 :    19012225 :   FOR_EACH_BB_FN (bb, cfun)
    7462                 :             :     {
    7463                 :    17516159 :       fix_bb_live_info (df_get_live_in (bb), remove_pseudos);
    7464                 :    17516159 :       fix_bb_live_info (df_get_live_out (bb), remove_pseudos);
    7465                 :   225486066 :       FOR_BB_INSNS_REVERSE (bb, curr_insn)
    7466                 :             :         {
    7467                 :   207969907 :           if (! INSN_P (curr_insn))
    7468                 :    33914589 :             continue;
    7469                 :   174055318 :           done_p = false;
    7470                 :   174055318 :           sregno = dregno = -1;
    7471                 :    44432427 :           if (change_p && NONDEBUG_INSN_P (curr_insn)
    7472                 :   204449893 :               && (set = single_set (curr_insn)) != NULL_RTX)
    7473                 :             :             {
    7474                 :    29381857 :               dregno = get_regno (SET_DEST (set));
    7475                 :    58763714 :               sregno = get_regno (SET_SRC (set));
    7476                 :             :             }
    7477                 :             : 
    7478                 :   174055318 :           if (sregno >= 0 && dregno >= 0)
    7479                 :             :             {
    7480                 :    10432654 :               if (bitmap_bit_p (remove_pseudos, dregno)
    7481                 :    10432654 :                   && ! REG_P (lra_reg_info[dregno].restore_rtx))
    7482                 :             :                 {
    7483                 :             :                   /* invariant inheritance pseudo <- original pseudo */
    7484                 :        8019 :                   if (lra_dump_file != NULL)
    7485                 :             :                     {
    7486                 :           0 :                       fprintf (lra_dump_file, "       Removing invariant inheritance:\n");
    7487                 :           0 :                       dump_insn_slim (lra_dump_file, curr_insn);
    7488                 :           0 :                       fprintf (lra_dump_file, "\n");
    7489                 :             :                     }
    7490                 :        8019 :                   delete_move_and_clobber (curr_insn, dregno);
    7491                 :        8019 :                   done_p = true;
    7492                 :             :                 }
    7493                 :    10424635 :               else if (bitmap_bit_p (remove_pseudos, sregno)
    7494                 :    10424635 :                        && ! REG_P (lra_reg_info[sregno].restore_rtx))
    7495                 :             :                 {
    7496                 :             :                   /* reload pseudo <- invariant inheritance pseudo */
    7497                 :        8019 :                   start_sequence ();
    7498                 :             :                   /* We cannot just change the source.  It might be
    7499                 :             :                      an insn different from the move.  */
    7500                 :        8019 :                   emit_insn (lra_reg_info[sregno].restore_rtx);
    7501                 :        8019 :                   rtx_insn *new_insns = get_insns ();
    7502                 :        8019 :                   end_sequence ();
    7503                 :        8019 :                   lra_assert (single_set (new_insns) != NULL
    7504                 :             :                               && SET_DEST (set) == SET_DEST (single_set (new_insns)));
    7505                 :        8019 :                   lra_process_new_insns (curr_insn, NULL, new_insns,
    7506                 :             :                                          "Changing reload<-invariant inheritance");
    7507                 :        8019 :                   delete_move_and_clobber (curr_insn, dregno);
    7508                 :        8019 :                   done_p = true;
    7509                 :             :                 }
    7510                 :    10416616 :               else if ((bitmap_bit_p (remove_pseudos, sregno)
    7511                 :     1164390 :                         && (get_regno (lra_reg_info[sregno].restore_rtx) == dregno
    7512                 :      550026 :                             || (bitmap_bit_p (remove_pseudos, dregno)
    7513                 :      184176 :                                 && get_regno (lra_reg_info[sregno].restore_rtx) >= 0
    7514                 :      184176 :                                 && (get_regno (lra_reg_info[sregno].restore_rtx)
    7515                 :      184176 :                                     == get_regno (lra_reg_info[dregno].restore_rtx)))))
    7516                 :    10874554 :                        || (bitmap_bit_p (remove_pseudos, dregno)
    7517                 :      626272 :                            && get_regno (lra_reg_info[dregno].restore_rtx) == sregno))
    7518                 :             :                 /* One of the following cases:
    7519                 :             :                      original <- removed inheritance pseudo
    7520                 :             :                      removed inherit pseudo <- another removed inherit pseudo
    7521                 :             :                      removed inherit pseudo <- original pseudo
    7522                 :             :                    Or
    7523                 :             :                      removed_split_pseudo <- original_reg
    7524                 :             :                      original_reg <- removed_split_pseudo */
    7525                 :             :                 {
    7526                 :      171486 :                   if (lra_dump_file != NULL)
    7527                 :             :                     {
    7528                 :           0 :                       fprintf (lra_dump_file, "       Removing %s:\n",
    7529                 :           0 :                                bitmap_bit_p (&lra_split_regs, sregno)
    7530                 :           0 :                                || bitmap_bit_p (&lra_split_regs, dregno)
    7531                 :             :                                ? "split" : "inheritance");
    7532                 :           0 :                       dump_insn_slim (lra_dump_file, curr_insn);
    7533                 :             :                     }
    7534                 :      171486 :                   delete_move_and_clobber (curr_insn, dregno);
    7535                 :      171486 :                   done_p = true;
    7536                 :             :                 }
    7537                 :    10245130 :               else if (bitmap_bit_p (remove_pseudos, sregno)
    7538                 :    10245130 :                        && bitmap_bit_p (&lra_inheritance_pseudos, sregno))
    7539                 :             :                 {
    7540                 :             :                   /* Search the following pattern:
    7541                 :             :                        inherit_or_split_pseudo1 <- inherit_or_split_pseudo2
    7542                 :             :                        original_pseudo <- inherit_or_split_pseudo1
    7543                 :             :                     where the 2nd insn is the current insn and
    7544                 :             :                     inherit_or_split_pseudo2 is not removed.  If it is found,
    7545                 :             :                     change the current insn onto:
    7546                 :             :                        original_pseudo <- inherit_or_split_pseudo2.  */
    7547                 :      687945 :                   for (prev_insn = PREV_INSN (curr_insn);
    7548                 :      687945 :                        prev_insn != NULL_RTX && ! NONDEBUG_INSN_P (prev_insn);
    7549                 :      230007 :                        prev_insn = PREV_INSN (prev_insn))
    7550                 :             :                     ;
    7551                 :      457938 :                   if (prev_insn != NULL_RTX && BLOCK_FOR_INSN (prev_insn) == bb
    7552                 :      445709 :                       && (prev_set = single_set (prev_insn)) != NULL_RTX
    7553                 :             :                       /* There should be no subregs in insn we are
    7554                 :             :                          searching because only the original reg might
    7555                 :             :                          be in subreg when we changed the mode of
    7556                 :             :                          load/store for splitting.  */
    7557                 :      439871 :                       && REG_P (SET_DEST (prev_set))
    7558                 :      339254 :                       && REG_P (SET_SRC (prev_set))
    7559                 :      263476 :                       && (int) REGNO (SET_DEST (prev_set)) == sregno
    7560                 :      179115 :                       && ((prev_sregno = REGNO (SET_SRC (prev_set)))
    7561                 :             :                           >= FIRST_PSEUDO_REGISTER)
    7562                 :      179115 :                       && (lra_reg_info[prev_sregno].restore_rtx == NULL_RTX
    7563                 :      139399 :                           ||
    7564                 :             :                           /* As we consider chain of inheritance or
    7565                 :             :                              splitting described in above comment we should
    7566                 :             :                              check that sregno and prev_sregno were
    7567                 :             :                              inheritance/split pseudos created from the
    7568                 :             :                              same original regno.  */
    7569                 :      278798 :                           (get_regno (lra_reg_info[sregno].restore_rtx) >= 0
    7570                 :      278798 :                            && (get_regno (lra_reg_info[sregno].restore_rtx)
    7571                 :      278798 :                                == get_regno (lra_reg_info[prev_sregno].restore_rtx))))
    7572                 :      637053 :                       && ! bitmap_bit_p (remove_pseudos, prev_sregno))
    7573                 :             :                     {
    7574                 :      100193 :                       int restore_regno = get_regno (lra_reg_info[sregno].restore_rtx);
    7575                 :      100193 :                       if (restore_regno < 0)
    7576                 :           0 :                         restore_regno = prev_sregno;
    7577                 :      100193 :                       lra_assert (GET_MODE (SET_SRC (prev_set))
    7578                 :             :                                   == GET_MODE (regno_reg_rtx[restore_regno]));
    7579                 :             :                       /* Although we have a single set, the insn can
    7580                 :             :                          contain more one sregno register occurrence
    7581                 :             :                          as a source.  Change all occurrences.  */
    7582                 :      100193 :                       lra_substitute_pseudo_within_insn (curr_insn, sregno,
    7583                 :             :                                                          regno_reg_rtx[restore_regno],
    7584                 :             :                                                          false);
    7585                 :             :                       /* As we are finishing with processing the insn
    7586                 :             :                          here, check the destination too as it might
    7587                 :             :                          inheritance pseudo for another pseudo.  */
    7588                 :      100193 :                       if (bitmap_bit_p (remove_pseudos, dregno)
    7589                 :           0 :                           && bitmap_bit_p (&lra_inheritance_pseudos, dregno)
    7590                 :      100193 :                           && (restore_rtx
    7591                 :           0 :                               = lra_reg_info[dregno].restore_rtx) != NULL_RTX)
    7592                 :             :                         {
    7593                 :           0 :                           if (GET_CODE (SET_DEST (set)) == SUBREG)
    7594                 :           0 :                             SUBREG_REG (SET_DEST (set)) = restore_rtx;
    7595                 :             :                           else
    7596                 :           0 :                             SET_DEST (set) = restore_rtx;
    7597                 :             :                         }
    7598                 :      100193 :                       lra_push_insn_and_update_insn_regno_info (curr_insn);
    7599                 :      100193 :                       lra_set_used_insn_alternative_by_uid
    7600                 :      100193 :                         (INSN_UID (curr_insn), LRA_UNKNOWN_ALT);
    7601                 :      100193 :                       done_p = true;
    7602                 :      100193 :                       if (lra_dump_file != NULL)
    7603                 :             :                         {
    7604                 :           0 :                           fprintf (lra_dump_file, "    Change reload insn:\n");
    7605                 :           0 :                           dump_insn_slim (lra_dump_file, curr_insn);
    7606                 :             :                         }
    7607                 :             :                     }
    7608                 :             :                 }
    7609                 :             :             }
    7610                 :      187524 :           if (! done_p)
    7611                 :             :             {
    7612                 :   173767601 :               struct lra_insn_reg *reg;
    7613                 :   173767601 :               bool restored_regs_p = false;
    7614                 :   173767601 :               bool kept_regs_p = false;
    7615                 :             : 
    7616                 :   173767601 :               curr_id = lra_get_insn_recog_data (curr_insn);
    7617                 :   367317846 :               for (reg = curr_id->regs; reg != NULL; reg = reg->next)
    7618                 :             :                 {
    7619                 :   193550245 :                   regno = reg->regno;
    7620                 :   193550245 :                   restore_rtx = lra_reg_info[regno].restore_rtx;
    7621                 :   193550245 :                   if (restore_rtx != NULL_RTX)
    7622                 :             :                     {
    7623                 :     5504128 :                       if (change_p && bitmap_bit_p (remove_pseudos, regno))
    7624                 :             :                         {
    7625                 :      797319 :                           lra_substitute_pseudo_within_insn
    7626                 :      797319 :                             (curr_insn, regno, restore_rtx, false);
    7627                 :      797319 :                           restored_regs_p = true;
    7628                 :             :                         }
    7629                 :             :                       else
    7630                 :             :                         kept_regs_p = true;
    7631                 :             :                     }
    7632                 :             :                 }
    7633                 :   173767601 :               if (NONDEBUG_INSN_P (curr_insn) && kept_regs_p)
    7634                 :             :                 {
    7635                 :             :                   /* The instruction has changed since the previous
    7636                 :             :                      constraints pass.  */
    7637                 :     4138402 :                   lra_push_insn_and_update_insn_regno_info (curr_insn);
    7638                 :     4138402 :                   lra_set_used_insn_alternative_by_uid
    7639                 :     4138402 :                     (INSN_UID (curr_insn), LRA_UNKNOWN_ALT);
    7640                 :             :                 }
    7641                 :   169629199 :               else if (restored_regs_p)
    7642                 :             :                 /* The instruction has been restored to the form that
    7643                 :             :                    it had during the previous constraints pass.  */
    7644                 :      637491 :                 lra_update_insn_regno_info (curr_insn);
    7645                 :     4775893 :               if (restored_regs_p && lra_dump_file != NULL)
    7646                 :             :                 {
    7647                 :           0 :                   fprintf (lra_dump_file, "   Insn after restoring regs:\n");
    7648                 :           0 :                   dump_insn_slim (lra_dump_file, curr_insn);
    7649                 :             :                 }
    7650                 :             :             }
    7651                 :             :         }
    7652                 :             :     }
    7653                 :     1496066 :   return change_p;
    7654                 :             : }
    7655                 :             : 
    7656                 :             : /* If optional reload pseudos failed to get a hard register or was not
    7657                 :             :    inherited, it is better to remove optional reloads.  We do this
    7658                 :             :    transformation after undoing inheritance to figure out necessity to
    7659                 :             :    remove optional reloads easier.  Return true if we do any
    7660                 :             :    change.  */
    7661                 :             : static bool
    7662                 :     1496066 : undo_optional_reloads (void)
    7663                 :             : {
    7664                 :     1496066 :   bool change_p, keep_p;
    7665                 :     1496066 :   unsigned int regno, uid;
    7666                 :     1496066 :   bitmap_iterator bi, bi2;
    7667                 :     1496066 :   rtx_insn *insn;
    7668                 :     1496066 :   rtx set, src, dest;
    7669                 :     1496066 :   auto_bitmap removed_optional_reload_pseudos (&reg_obstack);
    7670                 :             : 
    7671                 :     1496066 :   bitmap_copy (removed_optional_reload_pseudos, &lra_optional_reload_pseudos);
    7672                 :     2491663 :   EXECUTE_IF_SET_IN_BITMAP (&lra_optional_reload_pseudos, 0, regno, bi)
    7673                 :             :     {
    7674                 :      995597 :       keep_p = false;
    7675                 :             :       /* Keep optional reloads from previous subpasses.  */
    7676                 :      995597 :       if (lra_reg_info[regno].restore_rtx == NULL_RTX
    7677                 :             :           /* If the original pseudo changed its allocation, just
    7678                 :             :              removing the optional pseudo is dangerous as the original
    7679                 :             :              pseudo will have longer live range.  */
    7680                 :      995597 :           || reg_renumber[REGNO (lra_reg_info[regno].restore_rtx)] >= 0)
    7681                 :             :         keep_p = true;
    7682                 :      618897 :       else if (reg_renumber[regno] >= 0)
    7683                 :     1773337 :         EXECUTE_IF_SET_IN_BITMAP (&lra_reg_info[regno].insn_bitmap, 0, uid, bi2)
    7684                 :             :           {
    7685                 :     1288193 :             insn = lra_insn_recog_data[uid]->insn;
    7686                 :     1288193 :             if ((set = single_set (insn)) == NULL_RTX)
    7687                 :        6637 :               continue;
    7688                 :     1281556 :             src = SET_SRC (set);
    7689                 :     1281556 :             dest = SET_DEST (set);
    7690                 :     1281556 :             if ((! REG_P (src) && ! SUBREG_P (src))
    7691                 :      685097 :                 || (! REG_P (dest) && ! SUBREG_P (dest)))
    7692                 :      596487 :               continue;
    7693                 :      685069 :             if (get_regno (dest) == (int) regno
    7694                 :             :                 /* Ignore insn for optional reloads itself.  */
    7695                 :     1154916 :                 && (get_regno (lra_reg_info[regno].restore_rtx)
    7696                 :      577458 :                     != get_regno (src))
    7697                 :             :                 /* Check only inheritance on last inheritance pass.  */
    7698                 :      117980 :                 && get_regno (src) >= new_regno_start
    7699                 :             :                 /* Check that the optional reload was inherited.  */
    7700                 :      803049 :                 && bitmap_bit_p (&lra_inheritance_pseudos, get_regno (src)))
    7701                 :             :               {
    7702                 :             :                 keep_p = true;
    7703                 :             :                 break;
    7704                 :             :               }
    7705                 :             :           }
    7706                 :      979824 :       if (keep_p)
    7707                 :             :         {
    7708                 :      494680 :           bitmap_clear_bit (removed_optional_reload_pseudos, regno);
    7709                 :      494680 :           if (lra_dump_file != NULL)
    7710                 :           0 :             fprintf (lra_dump_file, "Keep optional reload reg %d\n", regno);
    7711                 :             :         }
    7712                 :             :     }
    7713                 :     1496066 :   change_p = ! bitmap_empty_p (removed_optional_reload_pseudos);
    7714                 :     1496066 :   auto_bitmap insn_bitmap (&reg_obstack);
    7715                 :     1996983 :   EXECUTE_IF_SET_IN_BITMAP (removed_optional_reload_pseudos, 0, regno, bi)
    7716                 :             :     {
    7717                 :      500917 :       if (lra_dump_file != NULL)
    7718                 :           0 :         fprintf (lra_dump_file, "Remove optional reload reg %d\n", regno);
    7719                 :      500917 :       bitmap_copy (insn_bitmap, &lra_reg_info[regno].insn_bitmap);
    7720                 :     1586656 :       EXECUTE_IF_SET_IN_BITMAP (insn_bitmap, 0, uid, bi2)
    7721                 :             :         {
    7722                 :             :           /* We may have already removed a clobber.  */
    7723                 :     1085739 :           if (!lra_insn_recog_data[uid])
    7724                 :           0 :             continue;
    7725                 :     1085739 :           insn = lra_insn_recog_data[uid]->insn;
    7726                 :     1085739 :           if ((set = single_set (insn)) != NULL_RTX)
    7727                 :             :             {
    7728                 :     1079740 :               src = SET_SRC (set);
    7729                 :     1079740 :               dest = SET_DEST (set);
    7730                 :      494903 :               if ((REG_P (src) || SUBREG_P (src))
    7731                 :      584849 :                   && (REG_P (dest) || SUBREG_P (dest))
    7732                 :     1664562 :                   && ((get_regno (src) == (int) regno
    7733                 :      222188 :                        && (get_regno (lra_reg_info[regno].restore_rtx)
    7734                 :      111094 :                            == get_regno (dest)))
    7735                 :      506470 :                       || (get_regno (dest) == (int) regno
    7736                 :      473728 :                           && (get_regno (lra_reg_info[regno].restore_rtx)
    7737                 :      473728 :                               == get_regno (src)))))
    7738                 :             :                 {
    7739                 :      552026 :                   if (lra_dump_file != NULL)
    7740                 :             :                     {
    7741                 :           0 :                       fprintf (lra_dump_file, "  Deleting move %u\n",
    7742                 :           0 :                                INSN_UID (insn));
    7743                 :           0 :                       dump_insn_slim (lra_dump_file, insn);
    7744                 :             :                     }
    7745                 :     1104052 :                   delete_move_and_clobber (insn, get_regno (dest));
    7746                 :      552026 :                   continue;
    7747                 :             :                 }
    7748                 :             :               /* We should not worry about generation memory-memory
    7749                 :             :                  moves here as if the corresponding inheritance did
    7750                 :             :                  not work (inheritance pseudo did not get a hard reg),
    7751                 :             :                  we remove the inheritance pseudo and the optional
    7752                 :             :                  reload.  */
    7753                 :             :             }
    7754                 :      533713 :           if (GET_CODE (PATTERN (insn)) == CLOBBER
    7755                 :           0 :               && REG_P (SET_DEST (insn))
    7756                 :      533713 :               && get_regno (SET_DEST (insn)) == (int) regno)
    7757                 :             :             /* Refuse to remap clobbers to preexisting pseudos.  */
    7758                 :           0 :             gcc_unreachable ();
    7759                 :      533713 :           lra_substitute_pseudo_within_insn
    7760                 :      533713 :             (insn, regno, lra_reg_info[regno].restore_rtx, false);
    7761                 :      533713 :           lra_update_insn_regno_info (insn);
    7762                 :      533713 :           if (lra_dump_file != NULL)
    7763                 :             :             {
    7764                 :           0 :               fprintf (lra_dump_file,
    7765                 :             :                        "  Restoring original insn:\n");
    7766                 :           0 :               dump_insn_slim (lra_dump_file, insn);
    7767                 :             :             }
    7768                 :             :         }
    7769                 :             :     }
    7770                 :             :   /* Clear restore_regnos.  */
    7771                 :     2491663 :   EXECUTE_IF_SET_IN_BITMAP (&lra_optional_reload_pseudos, 0, regno, bi)
    7772                 :      995597 :     lra_reg_info[regno].restore_rtx = NULL_RTX;
    7773                 :     1496066 :   return change_p;
    7774                 :     1496066 : }
    7775                 :             : 
    7776                 :             : /* Entry function for undoing inheritance/split transformation.  Return true
    7777                 :             :    if we did any RTL change in this pass.  */
    7778                 :             : bool
    7779                 :     1498730 : lra_undo_inheritance (void)
    7780                 :             : {
    7781                 :     1498730 :   unsigned int regno;
    7782                 :     1498730 :   int hard_regno;
    7783                 :     1498730 :   int n_all_inherit, n_inherit, n_all_split, n_split;
    7784                 :     1498730 :   rtx restore_rtx;
    7785                 :     1498730 :   bitmap_iterator bi;
    7786                 :     1498730 :   bool change_p;
    7787                 :             : 
    7788                 :     1498730 :   lra_undo_inheritance_iter++;
    7789                 :     1498730 :   if (lra_undo_inheritance_iter > LRA_MAX_INHERITANCE_PASSES)
    7790                 :             :     return false;
    7791                 :     1496066 :   if (lra_dump_file != NULL)
    7792                 :          97 :     fprintf (lra_dump_file,
    7793                 :             :              "\n********** Undoing inheritance #%d: **********\n\n",
    7794                 :             :              lra_undo_inheritance_iter);
    7795                 :     1496066 :   auto_bitmap remove_pseudos (&reg_obstack);
    7796                 :     1496066 :   n_inherit = n_all_inherit = 0;
    7797                 :     3290817 :   EXECUTE_IF_SET_IN_BITMAP (&lra_inheritance_pseudos, 0, regno, bi)
    7798                 :     1794751 :     if (lra_reg_info[regno].restore_rtx != NULL_RTX)
    7799                 :             :       {
    7800                 :     1129213 :         n_all_inherit++;
    7801                 :     1129213 :         if (reg_renumber[regno] < 0
    7802                 :             :             /* If the original pseudo changed its allocation, just
    7803                 :             :                removing inheritance is dangerous as for changing
    7804                 :             :                allocation we used shorter live-ranges.  */
    7805                 :     1129213 :             && (! REG_P (lra_reg_info[regno].restore_rtx)
    7806                 :      406277 :                 || reg_renumber[REGNO (lra_reg_info[regno].restore_rtx)] < 0))
    7807                 :      414296 :           bitmap_set_bit (remove_pseudos, regno);
    7808                 :             :         else
    7809                 :      714917 :           n_inherit++;
    7810                 :             :       }
    7811                 :     1496066 :   if (lra_dump_file != NULL && n_all_inherit != 0)
    7812                 :           0 :     fprintf (lra_dump_file, "Inherit %d out of %d (%.2f%%)\n",
    7813                 :             :              n_inherit, n_all_inherit,
    7814                 :           0 :              (double) n_inherit / n_all_inherit * 100);
    7815                 :     1496066 :   n_split = n_all_split = 0;
    7816                 :     2314626 :   EXECUTE_IF_SET_IN_BITMAP (&lra_split_regs, 0, regno, bi)
    7817                 :      818560 :     if ((restore_rtx = lra_reg_info[regno].restore_rtx) != NULL_RTX)
    7818                 :             :       {
    7819                 :      558613 :         int restore_regno = REGNO (restore_rtx);
    7820                 :             : 
    7821                 :      558613 :         n_all_split++;
    7822                 :     1117226 :         hard_regno = (restore_regno >= FIRST_PSEUDO_REGISTER
    7823                 :      558613 :                       ? reg_renumber[restore_regno] : restore_regno);
    7824                 :      558613 :         if (hard_regno < 0 || reg_renumber[regno] == hard_regno)
    7825                 :        2372 :           bitmap_set_bit (remove_pseudos, regno);
    7826                 :             :         else
    7827                 :             :           {
    7828                 :      556241 :             n_split++;
    7829                 :      556241 :             if (lra_dump_file != NULL)
    7830                 :           0 :               fprintf (lra_dump_file, "         Keep split r%d (orig=r%d)\n",
    7831                 :             :                        regno, restore_regno);
    7832                 :             :           }
    7833                 :             :       }
    7834                 :     1496066 :   if (lra_dump_file != NULL && n_all_split != 0)
    7835                 :           0 :     fprintf (lra_dump_file, "Split %d out of %d (%.2f%%)\n",
    7836                 :             :              n_split, n_all_split,
    7837                 :           0 :              (double) n_split / n_all_split * 100);
    7838                 :     1496066 :   change_p = remove_inheritance_pseudos (remove_pseudos);
    7839                 :             :   /* Clear restore_regnos.  */
    7840                 :     3290817 :   EXECUTE_IF_SET_IN_BITMAP (&lra_inheritance_pseudos, 0, regno, bi)
    7841                 :     1794751 :     lra_reg_info[regno].restore_rtx = NULL_RTX;
    7842                 :     2314626 :   EXECUTE_IF_SET_IN_BITMAP (&lra_split_regs, 0, regno, bi)
    7843                 :      818560 :     lra_reg_info[regno].restore_rtx = NULL_RTX;
    7844                 :     1496066 :   change_p = undo_optional_reloads () || change_p;
    7845                 :             :   if (change_p)
    7846                 :      106176 :     lra_dump_insns_if_possible ("changed func after undoing inheritance");
    7847                 :     1496066 :   return change_p;
    7848                 :     1496066 : }
        

Generated by: LCOV version 2.1-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.